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Omega Seamaster 300M Chronograph GMT Co-Axial Watch Hands-On

Omega Seamaster 300M Chronograph GMT Co-Axial Watch Hands-On Hands-On

Omega watch lovers are given an almost tedious amount of good options when it comes to what watch to want next. The “Omega love” is high here, but let’s be honest, when it comes to wanting a new Speedmaster or Seamaster choosing the right model for you is just under being as complicated as determining a new neighborhood to move to. There are a complex set of considerations, pluses, minuses, and “should I hold out for X” thoughts that go through your head. Well, to make things better/more frustrating, Omega has released the Omega Seamaster 300M Chronograph GMT Co-Axial watch as another model that ticks off several boxes in your “want list.”

With so much focus on the Seamaster Planet Ocean and the new for 2014 Seamaster 300 (not 300M, yes, we know it is a bit confusing), the longstanding Omega Seamaster 300M doesn’t get all the attention it perhaps deserves. A decade ago, it was all about the Omega Seamaster 300M (300 M). It was the James Bond watch, and it was an extremely versatile timepiece that came in a range of sizes, styles, and with both mechanical and quartz movement offerings.

Omega Seamaster 300M Chronograph GMT Co-Axial Watch Hands-On Hands-On

Omega Seamaster 300M Chronograph GMT Co-Axial Watch Hands-On Hands-On

Today, the Omega Seamaster 300M collection is relatively basic and exists just under the Seamaster Planet Ocean in terms of price. The movements are not fully in-house, but rather combine custom Omega parts with stock ETA movements. Frankly, the movements are very good and the value is there too, but you can’t turn them over and admire them like you can the very pretty in-house made Omega calibers. While most Omega Seamaster 300M watches today are three-hand automatics, there are some chronograph versions (such as the Omega Seamaster 300M Co-Axial Chronograph ETNZ Limited Edition, and its non-limited edition variants), and now for 2014, a Chronograph GMT Co-Axial.

In many ways, this new chronograph and GMT version of the Omega Seamaster 300M is a minor update to the Seamaster 300M Co-Axial Chronograph, but with a revised dial and GMT hand. That is OK with me, because I think it is a solid addition of a desirable feature. Omega actually has other chronograph GMT watches such as the Aqua Terra Chronograph GMT with the in-house made caliber 9605, but the layout is different than on the Seamaster 300M Co-Axial Chronograph GMT.

Omega Seamaster 300M Chronograph GMT Co-Axial Watch Hands-On Hands-On

Omega Seamaster 300M Chronograph GMT Co-Axial Watch Hands-On Hands-On

In a steel case with a matte dark gray ceramic bezel, the Omega Seamaster 300M in this form is 44mm wide and properly thick on the wrist. If there is anything you can say about Omega dive watches it is that they make for a bold presence on the wrist – especially the chronograph models. The iconic Seamaster 300M case is water resistant to 300 meters (duh) and has a manual helium release valve at 10 o’clock.

What is also very important to point out is that according to Omega, the chronograph mechanism can be used underwater. It is not super common that diving watches with chronographs allow for the chronograph complication to be used under water. In this case, the chronograph pushers are fully operational underwater which adds to the tool-watch appeal of this Omega Seamaster 300M.

Omega Seamaster 300M Chronograph GMT Co-Axial Watch Hands-On Hands-On

Omega Seamaster 300M Chronograph GMT Co-Axial Watch Hands-On Hands-On

Often replicated but never really well copied is the well-regarded Omega Seamaster 300M bracelet. Omega originally designed it as a more chunky dive-style version of the Speedmaster Professional bracelet, and it continues to have its charms. It also happens to be quite comfortable. Having said that, the Seamaster 300M Chronograph GMT C-Axial is also the type of watch that can look really good on a rubber strap.

Inside the Omega Seamaster 300M Chronograph GMT Co-Axial is the Omega caliber 3603 movement that is essentially a caliber 3330 with a GMT hand. This automatic movement has a Co-Axial escapement and a silicon balance spring. It operates at 4 Hz and has a nice power reserve of 52 hours. Also, like the in-house made Omega movements the automatic rotor winds in both directions. It further has a column wheel for the chronograph and the movement is COSC Chronometer certified. The dial features the time, date, 12 hour chronograph, and central GMT hand.

Omega Seamaster 300M Chronograph GMT Co-Axial Watch Hands-On Hands-On

About the Author

Fueled by an unshakable love for horology and a general curiosity for intricate things, Ariel Adams founded aBlogtoWatch in 2007 as a means of sharing his passion. Since then, ABTW has become the highest trafficked blog on luxury timepieces, and Ariel has become a contributor to other online publications such as Forbes, Departures and Tech Crunch, to name just a few. His conversational writing style and inclusive attitude brings a wider appreciation for watches the world over, and that's just the way he likes it.

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  • MikeinFrankfurt

    I saw this at Basel and the blue model, especially, was eye-catching in a fun way.  My only concern is that it looks too sporty (and big) to be used in all situations and that importantly includes versatile business travel.  I like to use my Rolex GMT2 when I travel (duh) and find that it pairs well with everything from a suit to a bathing suit.  If I were going on a 2 week dive/beach holiday, this Omega would be great, but at $7K, I’d venture to guess that most would buy something a little more serious looking.

    Still, a cool watch…I hate to get excited about weak resale values, but this would be a sweet used pick up at $4K…

    • mike kirsch

      i believe the movement is a Piquet 1278 altered for omega, not strictly ETA, but swatch owned.

      • mike kirsch

        1285 sorry

        • mike kirsch

          just picked one up
          less than a year old

  • Fraser Petrick

    Handsome watch, no question about it, but the face is too cluttered for my tastes, more information than I need or want. Who needs to know fractions of a second? For me, simplicity of style always works.

  • The ugliest Omega I’ve seen in a long time. case and dial are offensive, and that bracelet is outdated and fugly.

  • fritsveer

    Arel Et All, thanks for the comprehensive review (as always). 
    I like this combination of Chrono and GMT. GMT is for me a must (In-laws in USA, me in NL) en the chrono a bonus (how long is my flight/waiting line for security).
    The movement is not fully inhouse, partly ETA and Omega. Why Is the price @ 7.1k$ justified in this case?
    For approx 1k$ more brands like Omega and/or Rolex sell fully in-house movements (with almost same complications)

  • Ulysses31

    I’m not sure about this one.  I don’t like short hands, or hands that get fatter towards the end.  I don’t like dashes of red scattered around the watch in a sad attempt to make a watch look “sporty”.  I don’t like compromises to the functionality of the watch for the sake of being fashionable.  The text around the sub-seconds is just pathetic really, and an indicator that whoever designed this watch cares more about fashion than function.  There are few faster ways to lower your credibility and your apparent commitment to quality than that.  All in all it looks more like a knock-off rather than a genuine Omega – there are just too many clichés crammed into this timepiece for it to be taken seriously.

  • golestanreza

    I have to thanks creator of this art work, specially the blue dial is perfect.


    Did anyone file a requisition for another (over priced) GMT watch? Omega fills this niche with a rehash of earlier iterations, & even the much hyped Co-Axial cannot save it from drowning in its own superfluousness. I realize Omega is not interested in offering good price/value ratio watches as it did in halcyon times, but churning out these flaccid derivatives only serves to further alienate an already polarized, volatile group of detractors & gotta have its.

  • Feller87

    BIGCHRONO I actually just saw a seamaster from the 70’s randomly now THAT is a desirable watch and one worth having

    clean dial excellent visibility even a tad colorful to keep it interesting and classic  design still relevant today, heck its more relevant than this obfuscation of a watch


    I contend Omega was @ the peak of its powers from the 50’s-80’s, then started tinkering with winning concepts. Fixing unbroken things undermine stable foundations, always leading to breakdowns in quality, styles, & unjustifiably rising prices. I recall the Zenith debacle with those horrible creations. Nataf should have been imprisoned for treason.When it becomes a labor of greed rather than love, all is lost.

  • Feller87

    BIGCHRONO Feller87 true but zenith seems to be back on track with some of their latest releases particularly the doublematic I am obsessed with that watch

  • funkright

    I’ve had a few iterations of the OSMP Chrono (steel, titanium) and loved those watches. Especially the OSMP Chrono titanium version. Size w/o weight. I can just imagine the heft of this thing on the wrist. Additionally, that price, $7100 USD when for only a little bit more you can get a complete in house movement; well that leaves something to be desired. I am sure they’ll sell what they produce, but the only way I’d pick this up would be at a well discounted price, if they came out with a Ti version or used.

  • fritsveer Well…you could argue that technically it is fully in-house.

  • “Tedious amount of options” kind of sums up Omega these days. Add “unjustifiably overpriced” to that and we have a study of modern Omega. Those exclusive boutique rents ain’t cheap.
    Other than, perhaps, a nice vintage cal.321 Speedmaster, I can’t think of a single Omega that I’ve “gotta have”.

  • Tourbillion87

    Attractive piece. I like the beefy case and the thicker bezel. I had one gripe with the old 2254.50 model, and that was how thin and flimsy the bezel was. This one actually has sides which you can grip. The writing on the running seconds is just unnecessary.  I would get my hands on the yellow model for about half of what they are asking. The retail price is insulting.

  • droo

    I agree with Ulysse31 except for the hands, The ridiculous part of the dial are the seconds dial and the litterature around the brand name, I feel like elegance is a matter of being as simple as it can be… It is a fat watch for fat self-sufficient people and, this is the first time I have that feeling over Omega watches. It must be a marketing parameter since the people around 30-35 tends to buy enormous watches. Otherwise, the watch has to be (at that price) technically perfect, I am sure it is, with no way to have it overhauled elsewere than Omega headquarters…


    These are the vagaries of opening boutiques. Watches punitively priced to handle those bloated costs. Plus, Omega has burned many bridges by yanking authorizations from long time allies further poisoning its tarnished image. Tourneau no longer handles the line, & a dealer in NYC’s Bowery lost its rating about a decade back. It may have relocated to LI, & thankfully had other decent brands to cover themselves. Omega is a horological bully & thug. If one were ever gifted to me, I would immediately trade it for Breitling, Oris, etc.


    Very true, & the just released Rainbow looks good, but I’m afraid Zenith’s watches are separated by a moat of money grubbing prices. It has joined the elitist ranks of IWC, AP, & a host of other river pirates.

  • Natal should be working for Versace.

  • marbstiu

    Too much clutter – it already looks like one of those Grand Seiko chronographs with a messy/crammed design.

    I think this is what separates rolex from omega

  • star42

    This watch is clutter done right! Although busy, the dial is very clearly laid out and everything has it’s place. There’s a order present here amidst the chaos. The design looks beefy and tool-like in a decent size. Hats off to Omega for breathing new life into a dated and slightly boring design!

  • Piero

    Dial is too busy, too many functions. Price is as usual sky high… And the text around the small seconds is really bothering me.

  • X2Eliah

    yeah, I def. see other commenters’ remarks about this being a very cluttered watch, but (imho) it’s clutter that really, really works and makes sense in terms of overall aesthetics/design.

  • Fraser Petrick

    May a plague of Damn-the torpedoes, full-speed-ahead/Old Testament /England-expect-each-man-to-do-his-duty/Remember the Alamo/ My country right or wrong/Go leafs, Go locusts  descend upon the house of whomsoever criticizes my beloved Omega.

  • D S Vilhena

    I have to echo Ariel and the others who said Omega have way too many options to choose from. Gosh, it’s painful to keep track on every iteration from dozens of lines and models.

  • PaulMiller1997

    I look at watches like this, and I shake my head, and I thank my lucky stars that there are companies like Nomos out there.

  • BarracksSi

    I got my hands on this at the NYC boutique, and let me tell ya, pictures do not convey how fat the case is. The thing is crazy-thick. I don’t know if I could tolerate it. The dial layout is probably as clear as it could possibly be with all the functions it’s being asked to display; if I take off my glasses, I can still see what time it is. I also don’t really mind the text around the running seconds, because you know they’ll put “Co-Axial 300m”-etc somewhere else on the dial, and making it part of a subdial keeps the rest of the face less cluttered.
    It’s heavy, comically thick, and didn’t sit on my wrist for more than ten seconds — yet I can’t stop thinking about it. I almost want the danged thing after all.

  • I actually don’t think it’s that bad–ditch the 80’s bezel and the worst looking bracelet in known history and it just might work.
    As for the height that some have commented on, this seems to be a theme with Omega–all the Planet Oceans sit really high and struggle to balanace on the wrist.
    I wouldn’t say no if I’d received the blue one as a gift…But at some point some Omega top level manager must make the brave decision to stop making those bezels and bracelets…They didn’t look good way back when, and they sure don’t look any better now…

  • marbstiu I’ve also noticed that many high end Seiko and Citizen bracelets have those polished middle lines running down the otherwise brushed bracelet. For some reason it is supposed to convey a superior, luxurious and multi-layered finishing…too bad it sucks to look at…

  • marbstiu

    Panagiotis marbstiu Yes, and this bracelet here and most Seiko links do not look macho/cool to wear. Sort of a generic pattern u see in cheap steel $9 airport watches.

  • marbstiu Also, I realize I am opening the motherload of worm cans now, but if you take the essence of the of the two iconic chronos from the two brands, the Omega is the superior watch IMO..
    Take the moonwatch and the daytona. I believe that the moonwatch is exactly what a chrono should be, and epitomizes the perfect chrono design. The daytona in some iterations is not easy to read (silver diar) has more text on the face than a spelling bee final, and then you have those skewed-looking arabic numbers?!?! I cannot call the daytona a well designed watch–iconic yes, but iconic does not mean well designed 😉
    I like rolex, and I think the sub ND is the “perfect” watch. But you need some excitement and rolex isn’t going to provide it. Heck, even PP has more daring designs lately!
    So yeah, when Omega tries to come up with 100 different designs, some are going to be misses, but they do have many hits. I for one will take the latest “moonwatch” ceramic blue chrono over the daytona any day of the week.

  • marbstiu

    Panagiotis marbstiu rolex and omega have been toe to toe since time immemorial… But what i don’t like about Omega speedmaster is that it has way too much variants that it puts the entire swatch and Flik-Flak collection to shame.
    also the only iconic daytona is the paul newman panda haha

  • ZigSauerStardust

    Oh god…
    I realize I´m not only getting older, shit turns smaller every year to…
    is a mess of numbers and hands. Tell me what the left little hand
    provides you for information? Now it´s coaxial, and soon it´s gonna be
    chronometer and then 300m?

  • 5803822

    Great review and excellent “Pinit” blow up photos – 44mm just about at the extreme end of acceptable/universal size fits all (noted – width and length included in ref No – useful) — so whats not to like ? Maybe future service costs?

  • Marc de La Roche

    Nice write-up and pictures!
    I’m working/living in Africa, and my 21230445201001 just got delivered to my residence in Texas, so I haven’t been able to lay hands on it and read the manual. The PDF titled “Basic Functions” on the product page is confusing when it talks about setting the GMT hand, and I can’t find an Omage Video Manual for the caliber 3603 movement on YouTube.
    Could you please shed some light on this subject, or point me in the direction of electronic reference materials?

  • Michael Tan

    Nice article! Informative! Considering this over Rolex E2 because of additional chronograph function. Visited AD said movement is not silicon balance spring!

    Can someone confirm

    • Katnip Everlean

      That’s correct. Si14 balance springs are on the 8XXX and 9XXX calibers only.