The History Of Dive Watches

The History Of Dive Watches

The History Of Dive Watches Feature Articles

There are many things we take for granted when speaking about modern timepieces, and one of those is water resistance. There are no "water proof" watches, as that implies water would not be able to enter them under any circumstances, so we use the term "water resistant." The history of water resistant watches really began in the 1920s, but it was not until later that the serious water resistant diving watch came into existence. Today dive watches are the most popular type of sport watch, not necessarily because people use them to dive, but because of their style, promise of durability, and utilitarian value.

Regardless of whether one pays a few hundred or several thousand dollars for a watch, they rightfully expect reliability, accuracy, and comfort. Having said that, we are rarely reminded of just how much time it took wristwatches to transform from fragile pieces of art into workhorse instruments that can put up with most of the challenges we expose them to during our daily lives. Today we are looking into the history of water resistant and diving watches.  We will discuss the most important historical models, their respective design elements, as well as the challenges they have faced and conquered.

Much like in the case of our article on the History of ETA, the Swiss movement maker, we have to begin with a disclaimer, noting in advance that there is no one source that would list all relevant information. Instead, there is a great number of different–and superb–sources that detail different aspects at length, often revealing contradictory information. With that said, let's dive head-first into the more than a century deep history of waterproof watches.

The history of the wristwatch deserves a dedicated article which it will receive another time, but for now we will say that it was not off to an easy start. The first men's watches worn on the wrist were created from pocket watches that had lugs soldered onto their cases. Soldiers of the late 1800s and then of World War I sought a faster, easier, dare we say, "hands-free" way of telling the time while in combat. In general, however, wristwatches were considered to be womanly jewels that needed to be handled with excessive care. Consequently, men did not really care for early examples of these timepieces. The issue was their notoriously poor reliability: they were prone to breaking as they were exposed to a significantly greater amount of shocks, humidity and temperature changes when worn on the wrist and not inside the pockets of coats and vests.

The History Of Dive Watches Feature Articles

It had been clear that wristwatches would never gain popularity unless these issues were gone for good. Among the primary sources for all these problems were water, humidity and dust, all easily finding their way into the movement through the gaps around the crown and in between the inaccurately machined and assembled case elements. They would make components rust, cause lubricants to not function as they should and ultimately force gears and pinions to lock up and springs to deteriorate. So, first of all, if watches were to be worn on the wrist–giving them much greater exposure to these elements–there were some considerable makeovers to be performed as far as the manufacturing and assembling processes were concerned.

In harmony with what we have seen so many times while discussing the history of watches, it was the ingenious ideas of some engineers as well as the increasingly fierce competition in between key companies that led to the birth of some of the most important technological developments. Over the years, several great minds set to work to ultimately create revolutionary solutions which banished old ideas of the past. They engineered new designs that would serve to keep watches running throughout the following decades, or centuries even, designs on which we oftentimes rely even today.

The first step was to realize the source of the problems and then identify possible solutions so as to permanently rule them out. Pocket watches of the time–and note that we are talking about early 20th century here–and especially their cases were not crafted with high resistance and durability in mind. They were cherished and highly valued items and hence they spent incomparably less time exposed to nature's elements than wristwatches did and do today. As we pointed out above, their cases bore little to no seals around the crown and universally they were made and assembled in a way that allowed fine dust and humidity get into the case and the movement.

The History Of Dive Watches Feature Articles
Shown here is the Rolex Hermetic (or Submarine) with its "lid" removed, revealing the crown and the inner case of the watch. Source: rolexblog.blogspot.com

Paving the way to the creation of the first waterproof wristwatch was one of the most important brands of today: Rolex, and most notably its founder, Hans Wilsdorf. Among the most obvious and easy-to-perform solutions were the use of additional, external cases, ones that would hermetically seal the "real" case of the watch. A great example of this is the Rolex Hermetic or Submarine from 1922 (not to be confused with the Submariner which is a completely different watch from three decades later). What the Hermetic offered was a small round-cased watch with a chunky external case around it, which had a "lid" that would screw down onto it. It worked like a jar where once you screw on the top, the jar is sealed for good. This made sense here as there were no properly developed crown sealing systems and the lid covered that as well. The problem this created was that every time the hand-wound movement was to be rewound or the time needed to be set, the lid had to be removed and then put on again. The frequent use meant that the grooves on the side of the brass lid and the threads on the inside of it wore out quickly, necessitating repairs.

The History Of Dive Watches Feature Articles
An old advertisement showing Borgel's patented case construction, circa early 1900s. Image Source: VintageWatchstraps.com © David Boettcher

It was clear then that these oversized (because these chunky cases actually fit the term oversized) cases had no real future, at least not for the civil consumer. A more practical and more durable solution was needed and this meant there was no other way but to integrate all waterproofing into the watch's case. François Borgel, a Genevan master case maker had filed two patents, in 1891 and 1903, respectively, for two slightly different watch cases that had threaded parts. A major upside of this design was that it omitted the external case. Instead it would enable the "normal" case to achieve same levels of isolation. Speaking about the more advanced 1903 patent, it comprised a threaded ring that would go around the movement and bezel, and the case back would be screwed onto the outer, threaded surface of this ring. This resulted in a superior seal, without having to use a chunky external cover.

The History Of Dive Watches Feature Articles
Seen here is the patent for the early screw-down design by Perregaux and Perret. The part marked 16 is the seal, located on the outside of the case. Image Source: VintageWatchstraps.com © David Boettcher

While this meant a huge leap forward and major manufactures like IWC and Longines have used Borgel's cases for some of their watches, another major issue remained an unsolved mystery: the sealing of the crown. Humidity and fine dust could still find its way into the movement, albeit now at a slower rate, thanks to the threaded case design. The original idea–or at least the first patent–for a waterproof crown is credited to Paul Perregaux and Georges Perret. In October, 1925 they applied for a patent for a screw down crown, as seen on the extract from the patent above. As in the case of most breakthrough developments, the two watchmakers' design also showed some imperfections.

To begin with, the unscrewing of the crown happened in the same direction as the winding of the mainspring. To secure it again, the crown was to be turned the other way around, against the winding ratchet. Once the watch was fully wound and the crown was set in its secured position, it could not be unscrewed again until the mainspring wound down to some extent. Furthermore, the black component marked with number 16 on the image above is the sealing which the crown (once screwed onto the case) would push against, to actually create the seal. However, this sealing–owing to the limited manufacturing abilities of the time–could not have been made of more durable materials, so it was leather, cork or felt. Since it was installed on the outside of the case, it would quickly lose its isolating properties, making frequent replacements necessary. Without getting much too nerdy, let's briefly look at what–and who–made this already great idea perfect.

The History Of Dive Watches Feature Articles
Rolex founder Hans Wilsdorf's patent for the improved screw-down crown design. Image Source: VintageWatchstraps.com © David Boettcher

It was Hans Wilsdorf, founder and then-director of Rolex, who saw the potential in Perregaux's and Perret's invention as he realized that this idea coupled with the threaded case designs could ultimately create the first truly waterproof watch. He moved quickly and purchased the Swiss rights from the inventors and applied for the patent in the US, UK, and in Germany as well in 1926-1927. In the image above you see the results of a year's additional development in the form of Wilsdorf's own patent for the screw-down crown. Patented as CH 120848, one of the major improvements was the relocation of the seal from the outside of the case into the crown tube itself, while also making it from lead to enhance its durability.

Furthermore, the engineers of Rolex–and those working at C.R. Spillman SA, the case supplier of Rolex at the time–found a solution concerning the winding of the movement when the crown was being unscrewed: the crown initially rotates free from the stem and engages with it only when fully pulled out. This was achieved with what is marked with 9 (in red) and 12 (in yellow) on the image above. It is difficult to judge from the image, but these are two rectangular parts that engage once the crown is in the extracted position, hence enabling the wearer of the watch to set the time even if the mainspring is fully wound.

The History Of Dive Watches Feature Articles
The Rolex Oyster next to the Daily Mail headline with long distance swimmer Mercedes Gleitze who wore the watch in an attempt to swim across the English channel

Rolex combined its improved crown design and the threaded case in a new model that became the first durable and reliable waterproof watch. Called the Oyster, it was a remarkable achievement, albeit one against which the general public remained skeptical. To learn more about this iconic piece check out Ariel's article about the Oyster here. For now, we will concentrate on the process of how it turned into the legendary watch that it is and the way it managed to change people's attitude towards waterproof watches. It was in 1927 that the perfect opportunity arose to publicly prove the abilities of his watch and Wilsdorf was again quick to react. It was then that the young British secretary and long distance swimmer Mercedes Gleitze set herself the challenge of swimming across the English channel–for the second time. Why the second? Well, the story goes that Mercedes actually swam across the channel once, only to be "topped" by another woman who claimed to have done the same feat considerably quicker, around 13 hours instead of Gleitze's 15 hours.

At the time this attracted significant media attention and Wilsdorf wanted to have his share of it. Without going into much detail, we will just say that the other lady turned out to be a liar who admitted that she had not swam across the channel at all; a claim that made the media and the public question whether Mercedes' previous achievement was a fabrication as well. At last, Wilsdorf agreed with Gleitze that she would wear the Oyster on a necklace throughout her "vindication-swim," where she would prove the nay-sayers wrong . It is a lesser known fact that on this second attempt she actually did not make it all the way across the channel, but at this point it didn't matter. A few days later the story of her and her watch were discussed on the first page of the Daily Mail, bringing the general public the first tangible proof of a waterproof watch.  To make a more lasting impression Wilsdorf also arranged with retailers to have the Oyster showcased in their windows, set in a fish tank full of water. In conclusion, thanks to the exceptional developments and of course the witty marketing moves of the founder, Rolex–and with it the waterproof watch–made its first steps on the road that ultimately led it to prevail around the world.

The History Of Dive Watches Feature Articles
The Pasha de Cartier with its trademark crown cup and its tiny chain. Credit: Sotheby's

Around the 1930s several other brands wanted to get their share from this new market segment.  Turn your attention to two interesting interpretations of the waterproof watch, conceived by two already major brands: Omega and Cartier. Even at this time Cartier had been known as the go-to brand for the kings, monarchs and the world's elite in general. This is exemplified by an order Cartier received in 1932, placed by the Pasha of Marrakech who, as the legend says, wanted a waterproof watch which he could wear during his occasional swims. Cartier answered the Pasha's needs with a unique piece equipped with a round waterproof case as well as a little screw-on cap that served to seal the crown, hanging on a tiny chain fixed to the case itself. From 1943, and then from its 1985 "re-issue" up to this day, the watch is known as Pasha de Cartier, an iconic watch that is seldom recognized as one of the earliest examples among waterproof timepieces.

Around the mid-twenties, diving, an activity dedicated solely to scientific, military or "adventure-related" causes, started to become increasingly ubiquitous, brought about by the special breathing equipment developed by Yves Le Prieur in 1926 and then in 1933. The point of these diving related inventions was to make diving easier, less dangerous, while allowing them to happen for longer intervals, at greater depths. It is as complex of a challenge as it sounds, and then some. And while it took quite a few more years until diving could become more widespread, it had already been obvious that there was a need for wristwatches developed with the unique needs of this dangerous activity in mind. This is where Omega comes into the picture.

The History Of Dive Watches Feature Articles

See, while the original Rolex Oyster and the Pasha de Cartier (and other lesser-known, albeit similar waterproof watches of the time) performed rather well when it came to keeping moisture, sand and relatively small amounts of water out of the case, they were not at all worthy of consideration when it came to the much more demanding, deeper dives. The first watch which was designed to tackle greater challenges, and hence to work with divers, was Omega's Marine from 1932. This model brought the external, hermetically sealed case to the forefront again, something with Rolex's innovations in mind may seem to be an outdated choice. Still, it actually was the fact that Rolex had those patents to its name that Omega had no other choice but to go with the external case, not to mention the fact that where they were going only a strong external shell could be used. With all that said, Omega's final product turned out to be rather modern anyhow, as the Marine proved to be true to its name and became the world's first diving watch, i.e. the first watch to successfully complete some seriously deep dives.

What made the Marine so unique and so capable was this two-part case, which had its top and bottom pieces connected to the straps, while a large clasp locked them securely on the case back. Furthermore, the Marine was the first watch to have a synthetic sapphire front, clearly an important step forwards in terms of reliability compared to any other material used at the time. The "package" was completed by a seal leather strap which, by Omega's claims, were extremely resistant to salt water. The concept was ready so it was time to put it to its paces: Omega, likely "inspired" by Rolex's marketing successes, set out to prove the special capabilities of their watch by testing through a series of challenges, challenges which were of previously unimaginable difficulty. In 1936 a couple of Marine watches spent minutes in hot water (of 85 degree Celsius) and were then quickly submerged to a depth of 70 meters in the 5 degree Celsius cold waters of Lake Geneva for thirty minutes. When they were taken out, all pieces (two complete watches and a case with no movement inside) were functioning perfectly, showing no traces of water inside.

The History Of Dive Watches Feature Articles
Vintage ad for the Omega Marine, circa 1940s. Source: timezone.com

Three years after the successful tests, in 1939, Omega revealed the Marine Standard. It was a slightly redesigned version of the Marine from 1932, as this new piece served to transfer the Marine and most of its abilities into the publicly available collections of the brand. The case had become less complex to reduce manufacturing costs, but it retained the rectangular shape of the original. It was due to this angular shape that–quite obviously–no threaded case components could have been used. Instead, in order to properly seal the sapphire crystal and the case, they went on to use rubber gaskets, a solution still used today!

On the first series of Marine Standards the sapphire crystal was fitted from below the bezel (i.e. from the caseback side). With that done, Omega would install the dial, the movement and the crown. The problem this construction created was that while as pressure built up it pressed the case onto the caseback, and pushed the crystal towards the inside of the watch, weakening the seals. This decreased the Standard's water resistance to a mere two atmospheres (around 20 meters), which was incomparable to its predecessor's performance. For the following generations, however, the crystal had been installed from "above," a process that, although widely used today, at the time (during the early '40s) was a novel idea that substantially increased water resistance.

Looking back at the earliest generations of waterproof watches we can conclude that some of the greatest companies have all developed their own answers to the same problem: sealing the gaps between the case, the bezel and the crown. And while they were quick to top their latest developments with even more efficient ones, they were also unaware at the time that collectively they had most of the puzzle pieces which would ultimately make up the modern diver's watch. Let's discover the transition and see what exactly led to the dive watch, as we know it today.

The History Of Dive Watches Feature Articles
One of the first Blancpain Fifty Fathoms on the wrist of Bob Maloubier, founder of the Nageur de Combat

In many ways, diving watches mean the pinnacle of modern watchmaking. We saw watches being worn on the Moon, exceed the speed of sound, but defeating the immense pressure that prevails only at the deepest points of our planet is a completely different challenge altogether. This is best proven by the process of how watches sneaked out from our vest pockets and onto our wrists, to ultimately become instruments capable of performing in tens or hundreds of thousands special military actions and scientific dives alike, withstanding extremely demanding conditions. It is no wonder then, that dive watch enthusiasts have a special feeling when strapping a watch with such pedigree on: as weird as it may sound for "outsiders," it does grant a feeling of indestructibility when your only and most important accessory has stood the tests of such demanding conditions. So let's take a closer look at what led from the first "waterproofs" to the engineering masterpieces that made it to the Mariana trench–and back.

For a kick-off, it is important to clarify that the Rolex Oyster indeed was the first properly waterproof watch–as validated by Gleitze's swim and the time it spent in fish tanks. However, it was with reason that she wore it on a necklace and not on her wrist: this way the watch had been not subjected to the rather brutal forces of it splashing into the water with every motion of her arm, for hours on end. The first step towards improved durability was the already discussed Omega Marine, but even so, it saw little use as professional diving (not to mention its much later developed, hobby-inspired alternatives) had not been fully developed at the time. In fact, it took the better part of another decade or so until underwater activities became more ubiquitous; the primary reason being that diving equipments were very heavy, not very safe, and limited in availability. This radically changed with the 1942 invention of Jacques-Yves Cousteau and Émile Gagnan: the aqua-lung.

This is important as it greatly affected the future of dive watches, so let's briefly discuss what this new equipment was. The aqua-lung was the first open circuit breathing apparatus that allowed dives up to depths of 60 meters (or around 180 feet), all without direct connection with the surface. The most important consequence of it was that it helped accelerate developments in the fields of both professional, scientific, and hobby diving, hence making them more widely available around the world. As a result of World War II, warfare and the following popularization of diving, more refined and more durable accessories were required, items such as depth meters, compasses and, of course, wristwatches.

It would make things a lot easier if we could start discussing the history of dive watches with a single model, but things are never so straightforward, unfortunately. Many brands wish to–and can rightfully–claim that they were the first, albeit all in different ways. With that said, once we start digging deeper than mere marketing communication allows, the picture starts to clear up and the truly revolutionary watches and brands become more easily identifiable.

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  • MikeinFrankfurt

    Very nice article and nice inclusion of brands such as Doxa, etc.
    I suppose you’ll hear a lot of different comments about other important dive watches that are worth mentioning.  I’d think the original Seiko 6159 “tuna” has some historical significance for it using a novel case design plus the first commercially available Titanium case.  Also, not sure who made the first digital diver, but that’s certainly of significance as that seems to be what many wear today.

    Thanks!

  • David Bredan

    MikeinFrankfurt  I’m glad you liked the article and thanks for the note. I am aware that there are more than plenty of interesting solutions out there from a great number of small and large brands. However, this time around we wanted to highlight the pieces which were the cornerstones in the history of dive watches, without which all the other, more modern and more developed ones could have never come to existence.
    So, while I completely agree with you, I feel that this article already is very extensive (and exhaustive, perhaps), so mentioning all more interesting or novel ideas would have made it many-many times longer, without adding more weight to the discussion which is dedicated to the pieces which carry true historical importance.

  • MID

    David Bredan MikeinFrankfurt  Seiko’s contributions to dive watches were hardly peripheral.  If nothing else, historically, they became they became the workhorse watches of many American servicemen in the far east.  The omission of Seiko’s contributions is a serious oversight.

  • Oelholm

    MID …So, apart from being popular, what are Seiko’s contributions..? “Serious overight”, pfft.

  • SecuringTheLead

    I really enjoyed this article! Thanks!

  • estrickland

    Oelholm MID  The tuna can design was an important innovation in making mechanical dive watches shockproof. Other innovations include the use of titanium and ceramic for corrosion resistance, the L-shaped gaskets that eliminated the need for a HEV, the z-wave strap which remains snug despite wetsuit compression, the anadig chronograph dive watch, etc…
    I think it’s a good article, but agree Seiko’s innovations are more historic than the silly DeepSea Challenge.

  • David Bredan

    estrickland Oelholm @MID I truly appreciate your remarks. I feel that there is a chance of misunderstanding here: what has been mentioned in the article is not everything we consider to be related to the history of dive watches and definitely not everything we initially considered for inclusion or carried out extensive research on. 
    We wanted to create an educational and interesting article that is not available anywhere else. The result which you are looking at above is at least 20 pages in length in any large format magazine and while digital media offers different spacial limitations, there is a line that you have to draw.
    And so while there clearly is a vast amount of other noteworthy brands and innovations (each of which could rightfully considered as worthy for inclusion), our goal was to create an article that gives a comprehensive look at some of the most important pieces in the history of dive watches (pieces which were in some way boldly new and ground-breaking) – and not one that mentions every innovation that added something to it. I could think of well over a couple dozens of noteworthy innovations, designs and technological tweaks that made a difference at some point (and not just from Seiko, but from other major and minor brands, manufactures, suppliers and innovators). The number of different case, crown, strap and clasp designs, materials and other clever solutions which were invented during the better part of the last half a century is truly unfathomable – and the great majority of them would be worthy of attention, which is why we cover them anytime we review or debut a watch which is relevant to that piece of innovation.
    But again, the goal here was to create a historical overview (and yes, an exhaustive one at that), which gave an idea on the history behind those incredibly resistant timepieces called Dive watches by listing some of the pieces which we considered to be truly ground-breaking or record-setting from the past 100 years.

  • notofthisearth

    Cool…

  • MID

    estrickland Oelholm MID  You beat me to it.  I was indeed going to point to the “tuna” professional dive watches, as they do  not require a helium valve for SAT dives, as only one of many innovations.   (Another is the quartz dive watch with EOL indicator.)  But my broader point is one cannot overlook one of the most popular line of dive watches, which have been on may important dives and expeditions, in an article about the development of the dive watch.

  • I did not know there was such a history of a dive watch. Truly interesting. Thank you for posting this – it was very informative.

    ShakD

  • spiceballs

    Nicely done David and clarifies the necessity for maintaining water resistance and operation of “dive watches” by regular maintenance and gasket replacement..

  • DG Cayse

    Very good presentation Mr. Bredan. Excellent documentation and material. Well done.

  • aj_123

    David Bredan MikeinFrankfurtThanks David, a great article with lots of information. As with science in general a good answer reveals more questions. The history and signficance of Seiko dive watches cannot be overstated and would easily fill another article. You seem to be interested in a certain type of manufacture and so it follows you’d write about what you know. There are as you stated many other forums on this subject and others that deal with Seiko divers specifically. Ariel has also covered them in the past. Is that a challenge? Maybe. Maybe your readership here would like to see you take on a Japanese manufacture as a project. Keep writing!

  • David Bredan

    aj_123 Thanks so much for the kind words! “A good answer reveals more questions” – I could not have said that better myself.
    I deeply respect Seiko as a brand and I feel that in some ways they still do not get the recognition that they deserve (partly due to them restricting the availability of some of their truly great products in the European or US markets). I for one have a MarineMaster SBDX001 very-very high on my have-to-have list, racing neck-to-neck with something from Crepas for my next indestructible diver… But still, it was excluded this one time as we have already left behind just about every common spacial limitation in our efforts to concentrate on the few examples which were the first in one or more ways and have fundamentally and largely shaped today’s dive watches and/or what they are capable of. But that is not to say that anything else is not worthy of our attention. On a closing note let me add, that we presently have 109 articles on ABTW which are in some way related to Seiko, and that should indicate how important it truly is.

  • David Bredan

    DG Cayse spiceballs ShakD SecuringTheLead  Thank you very much for your kind words!

  • Albi

    Great article, David! Thanks!!

  • Humanloop

    Very useful article! I gained a lot of great knowledge. Thanks!

  • Morteza Alavizadeh

    It was the best watch article I had read in a long time. Very thorough. Thank you so much. I learned a lot today.

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  • steward1507

    One minor quibble, hydrogen is the lightest element, not helium. NASA had a bitch of a time with the Saturn V rocket for one simple reason: hydrogen can and does ‘migrate’ into metal and makes it very brittle and prone to cracking, hence failure.

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  • The women who painted watch dials did not lick their brushes. This is commonly repeated on the interwebs, but the radium paint was turpentine-based and nobody would put that in their mouths.

    What actually happened is that the paint came in the form of a very fine powder. The dial painters had to add thinner and mix their own paint in small batches. This fine powder got everywhere and ended up getting inhaled and ingested. Even very tiny amounts of radium is deadly. Radium tends to collect in the bones, and one of the most horrific consequences is that some of these women developed necrosis of the jaw. At least one of the women had to have her lower jaw surgically removed to save her life.

    Legislation against the dial-painting industry (the industry continued to deny the problem long after it was well-known) was one of the first instances of legal action being taken against an industry that was knowingly harming employees.

    See the book, Radium Girls: Women and Industrial Health Reform, 1910-1935, by Claudia Clark.

    The first water-resistant, double-cased watch used by Rolex was actually developed and patented by Gruen during the First World War. The Gruen ‘moisture-proof military wrist watch’ is shown in a Gruen publication from 1918 (see image). In the 1920s, Gruen sold this same model as an early sports watch.

    Rolex and Gruen were neighbors and had a friendly relationship. The two companies were not competitors, since Rolex’s market was primarily the British Empire and Gruen’s was the United States. Rolex licensed some Gruen technology in some early models. The Rolex Prince, for instance, used a re-badged Gruen Techni-Quadron movement, and Rolex pocket watches used Gruen movements. Apparently they also used Gruen’s moisture-proof watch case (I had not been aware of this).

    Rolex did not have any manufacturing capability in its early years, and Gruen and Rolex both owned shares of the Swiss manufacturer Aegler. The former Aegler factory is now the main Rolex building in Biel, and the former Gruen Precision Factory, which is across the street, is now also part of Rolex.

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  • Invicta watches review

    I would choose the watch have waterproof because it more usability when I swimming or bathering

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  • Work very fine, very nice! I love you! thanks for sharing!
    https://www.justvirginhair.com/

  • Alex Hoksbergen

    Great article, I enjoyed and learned a few interesting things… But little mistake here..”glass popping out while the divers were still in the water, on there way up”?..It’s not quiet like this…Divers are brought up in pressurised chamber breezing Heliox (Oxygen+helium) and under pressure helium found its way inside the watch. During the decompression process, when the pressure is gradually decreased to bring back divers to “surface pressure/1bar), the helium trapped in the watch increases in volume enabling it to escape, and eventually pop the glass…Also you mentioned: Doxa patented the helium valve in 1969 and released the Doxa 300T conquistador in 1969, preceeding the sea dweller?..Sure? But the Sea Dweller was released in 1967 isn’t it…It’s his 50th anniv. this year.

  • Informative article, I enjoyed reading a every line of it. Thanks for brief detail, When talk about dive watches, I just get excited or specially about the brands as DOXA. I like it because of it’s look, fine design or features which fulfil the requirements of Divers easily.

  • Naswin

    It interests me why the Zodiac Sea Wolf, released to public in 1953 and good for 200 meter depths, isn’t mentioned here. I understand the limits of the article thoroughly and why other makes were not included (like Seiko for example), but the Sea Wolf certainly falls within these limits. Given it surpassed the Blancpain Fifty Fathoms’ 91 meter depth by more than double and was released the same year to the public, one wonders if the Sea Wolf wasn’t more advanced than the FF and what early innovations the Sea Wolf contributed to dive watch development. Considering how iconic and popular the Sea Wolf was and the timing of it’s development and release, I feel addressing the Sea Wolf here was warranted. Good article, and I would like to learn more about the development of the Sea Wolf if you guys get around to it in the future.