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Seiko Prospex SRP777 Dive Watch Review

Seiko Prospex SRP777 Dive Watch Review Wrist Time Reviews

Every now and then a new watch manages to vibrate at just the right frequency to perk the ears of the general watch enthusiast base. Rustling the fault line of watch enthusiasm takes a special watch, one that offers a hard-to-quantify mix of design, function, price, history, and the secret-sauce of enthusiast appeal. With an accessible price point, proven design, strong functionality and a dollop of that undeniable Seiko diver charm, the new Seiko Prospex SRP777 has quickly become the darling of Instagrammers, desk-divers, and general sport watch enthusiasts since its release late last year. No other brand manages to offer a better sport watch for less of your hard-earned money, and Seiko wisely builds upon the success of each model generation, evolving their product to reflect their ability, history, technology, and core strengths. Inspired by a Seiko diver from the mid-Seventies, the Seiko Prospex SRP777 and its siblings are a direct nod to Seiko’s past and a successful and unironic play in the ongoing trend of “new vintage” watches.

Based directly upon Seiko’s cushion-cased reference 6309, the new Seiko Prospex SRPs come in several variations. Depending on your local market, you can choose between the black-dialed SRP777, the black and gold SRP775, the blue dial/bezel SRP773, the black and red SRP779, PADI Edition SRPA21, or the Thailand LE Zimbe SRPA19K. This review will focus on the SRP777 and its included black silicone strap. The original 6309 was produced from 1976 to 1988 and the new Seiko Prospex SRP777 is a faithful recreation, save for just a few small tweaks. The wide 44mm steel cushion case remains from the original (technically 44.3mm on the SRP) as does the main dial design, day-date feature, unidirectional dive bezel, crown at four, and generous lume application. The SRP777 adds Seiko’s Prospex “X” a new seconds hand design, drilled lugs, 200m water resistance, and an upgraded movement. Most importantly, Seiko has not diminished the charm of the reference model, offering only slight updates that result in a more accessible and practical design which manages to tread the line between subtle evolution and outright copy.

Seiko Prospex SRP777 Dive Watch Review Wrist Time Reviews Seiko Prospex SRP777 Dive Watch Review Wrist Time Reviews

With a flat Hardlex crystal and a solid steel Tsunami case back, the Seiko Prospex SRP777 could easily be viewed as an update to other massively-popular Seiko divers like the SKX007. In fact, when you factor for the addition of drilled lugs (often considered an old-school feature) and the inclusion of Seiko’s more capable 4R36 automatic movement, I think that despite its new vintage design, the Seiko Prospex SRP777 is arguably an update for the SKX007 audience. Unlike the 7S26 powering the SKX, the 4R36 offers hacking and hand-winding, along with 41 hours power reserve and a 3Hz rate. The 4R36 is a simple yet robust movement that was designed to be fuss-free for as long as possible; a tool movement for a tool watch. If you want better, Seiko does that too (see: Grand Seiko).

The dial is a finely textured matte black that almost looks like teflon in some light. The markers are large and nicely matched by the handset, the result of a combination that Seiko has been refining for more than 30 years. The lume will make you hunt for dark places, offering an astoundingly bright initial expression that fades evenly and offers ample glow to eyes that have adjusted to dark environments. The Seiko Prospex SRP777’s lume is classic Seiko and excellent by any measure.

Seiko Prospex SRP777 Dive Watch Review Wrist Time Reviews Seiko Prospex SRP777 Dive Watch Review Wrist Time Reviews

With 22mm lugs and a case shape that is pushing towards a full-on square, the Seiko Prospex SRP777 wears smaller than you would expect. The shape and ergonomics are excellent, especially for a watch of this size. With a short lug-to-lug, the case sits securely and evenly, even on a boney wrist like mine. The bezel is afforded enough height to offer an excellent grip, and the action is both smoother and more precise than that of my SKX007 (which has seen its fair share of abuse). Given my penchant for frequent strap changes, the drilled lugs are a welcome addition and really make the process about as fast and simple as it can be.

Seiko Prospex SRP777 Dive Watch Review Wrist Time Reviews

Being a dive watch, and moreover a dive watch with some legacy, I felt required to take the SRP777 underwater. Unsurprisingly, the Seiko Prospex SRP777 feels right at home underwater, with the included vented silicone strap being long enough to wrap around the wrist segment of a thick wet suit glove (though not long enough to span the forearm of my dry suit). The bezel is excellent and is easily gripped with a wet glove, providing enough feedback for predictable use above or below the surface. Likewise, legibility is perfect, with a clear view of elapsed time and the running seconds hand. To keep this explanation no longer than it needs to be, the Seiko Prospex SRP777 offers everything required by a true dive watch and performs its duties without issue.

About the Author

James (@jamesstacey) is a writer, dilettante photographer and part-time adventurer. An obsessive fan of many things, he loves watches for their breadth of style, historical connections and raw technical design. James has tendency for diving with dive watches, obsessing about case thickness and, despite owning a vast collection of leather straps, he lives by the adage - "when in doubt, just nato". He also wrote this entire bio himself and is pretty sure it's not a cry for help.
What do you think?
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  • I love it! (23)
  • Thumbs up (18)
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  • DeepEye

    My only problem with this watch is size. At the moment Seiko has no midsize offering whatsoever in their automatic diver range. I mean, something more up-market from the base skx013. And no, a 42-44mm watch is not a viable option for a 16cm wrist.
    If they made a 38mm version of this watch, that’d be great.

    • Dinkee, H. O.

      “…a 16cm wrist.”

      What are you — some kind of a giant? I have a normal man’s full-sized 5 1/2 inch (14cm) wrist. Yours is 6 1/4!!! Is this some kind of joke? I’d have to see photos of this superhuman wrist with a watch on it before I can take you seriously.

      • sethsez

        …the average wrist size of an adult male is between 6.5 to 8 inches, with just a bit over seven inches being the most common.

      • laup nomis

        You’re confusing ‘wrist’ for something else it seems. In which case, its probably quite large.

      • Drazen B

        “…I have a normal man’s full-sized 5 1/2 inch (14cm) wrist…”

        That’s far from normal, unless you’re kid or a female.
        You’ve been spouting nothing but hatred and disdain for the watch covered in this thread, yet it would look ridiculous on a wrist of your size that it should be something of a no-brainer to avoid in your case.

        • Dinkee, H. O.

          You are hereby banned from Hodinkee.

          • Drazen B

            Great reply.

            …and if that place is frequented by people like you I indeed do not want to be affiliated with it.

            Goodbye and good riddance, Hodinkie…

  • John William Salevurakis

    Though the first comment here proves me wrong, I can’t imagine even the most picky watch enthusiast having a real problem with this piece. Basically perfect for its price point.

    • DeepEye

      The watch is perfect. But even though it has a relatively short lug-to-lug distance, it still is way too big for a small wrist. I know, since i owned and sold a few 42mm sized watches. 34 to 38mm fits me perfectly . It’s a shame they don’t do smaller divers, and i have to look up to the likes of Omega 300 Diver to find a similar aesthetics (round, applied indices etc).

      • James Riley

        Skx013 is a bit harder to find these days but is an excellent choice at 38mm

  • laup nomis

    I’ve got the SRP773 on order – the blue dial, blue bezel with oyster style bracelet. I’m not a rubber strap fan, though they have their place.
    Interesting about the size; they wear small as you say because of the short lug width. Its the same with my SKX009, it wears small for a 42mm too. But then this suits me. I’ve got 20cm wrists, so I suppose I could wear large, but lately I’m really going off large watches. (Each to their own, I’ve got nothing against them, they suit some people. Just not for me though).
    I love the cushion shape case, and its vintage vibe. But as I’ve said before, if vintage gets even more fashionable than it currently is, I’m going to only buy ultramodern sci-fi looking stuff. But that’s only because I’m a contrary miserable old git.

    • Nick Chang

      The SRP773 is also a good choice and I noticed that its currently the most expensive model of the series from the prices I’ve seen online. Could it be due to its higher demand?

      Regarding rubber straps, these new Prospex Turtles sport a soft silicone strap that is very comfortable which really tempts me to buy another one like the SRP777 reviewed. Anyways, cheers to your new SRP773 🙂

  • john coleman

    Just love Seiko especially their divers. I have a Seiko Kinetic Diver and it’s hardly ever off my wrist.

  • IanE

    Gretat value – my only niggle is that I’d like all the hands a little longer.

    • Antjay

      I really like this watch , but damn it , now I can’t un-see the slightly short hands !
      Looks like they were carried over from the , apparently much lamented , 38mm version.

  • word-merchant

    I’ve heard people voice concern over the accuracy, reliability and durability of the lower end Seiko movements. Anyone had any problems here?

    I’d also want a ceramic bezel insert and a slightly better defined grip on the bezel – it looks a bit like melted butter (if butter was silver) to me. Otherwise, a good effort Seiko, but I’d still rather they resurrected the Pogue.

    • wrigduo

      Well, I bought SNZH55K1, 4 months ago. I unboxed it, set the time, and date…and…thats it! 4 months later the watch is pretty much accurate, give it few/less seconds.. sometimes i must set the date when moth has 30/31 days and that it. In my case durability is superb. I am wearing it in every ocassion, + diving in sea and outdoor sports…
      I must say that i removed stainless bracelet and put silicone one… now looks more sporty lol 😀

    • DeepEye

      The durability of lower end Seiko movements is excellent.

      • john coleman

        agree 100%

    • dennis

      The skx models with the 7s26 movement is not accurate at all, i have the 009 model,
      like it but this model does offer much better time keeping.

    • TrevorXM

      Now you’ve done it. Now we’re going to hear a bunch of anecdotal nonsense stories from Seiko fanboys about how their $200 Seikos are more accurate than a Rolex. Thanks for that.

      • Han Cnx

        Not as accurate of course (unadjusted, machine-regulated, less fancy materials) but reliability and durability is pretty much up there. 😉

      • DeepEye

        After a few adjustmens, i actually managed to get my SKX013 to run better then my AirKing 😀 . 0s/day while on the wrist. While the Rolex is +3s/d.

        Yeah, sometimes it can be more accurate than a rolex….

        • Dinkee, H. O.

          This man is claiming to have a 16cm wrist (I just read below). Mine is a normal man’s 5 1/2 inch (14cm) How about a shot of your Seiko on this monster wrist so that we can believe your claims?

  • Phil Ormsby

    I still use my SKX for diving and see no need to replace it but if I needed to, would likely go with the Prospex. But, it would be a pure dive watch and I don’t think it’s as flexible as a daily wearer primarily due to size. The upgraded movement is also welcome – my SKX runs a little slow – about 30-40 seconds a day.

    As a Caribbean diver James, I have to say, the vis in your photos would be challenging to me! Nice to see someone else diving a Zeagle Stiletto – great BC!

    • TrevorXM

      “…my SKX runs a little slow – about 30-40 seconds a day.”

      I wonder how accurate this new movement will be then?

      • Phil Ormsby

        Quite a bit better. I think the issue with the SKX is the low power reserve and the inability to manually wind it. Accuracy is much better when I wear it for several days in a row and the mechanism has a chance to fully wind. At lower reserve levels the accuracy suffers.

      • Han Cnx

        That’s a bit out of spec.. But can easily be brought back in line with some basic regulation of the movement.

        My SKX007 runs about +5, my SKX009 about -3. (Neither of them regulated). These turtles should get very similar accuracy. (With some outliers of course, you can alwasy get unlucky)

        • TrevorXM

          The factory spec daily rate for the 4R36 is:

          -35/+45 seconds a day,

          +/- 30 seconds day isochronism fault,

          +/- 30 maximum positional variation

          You must have a couple of miracle watches on your hands, as the 4R36 is supposed to be an upgrade from your watches.

          • Han Cnx

            * Upgrade in the sense that the movement has a hand-winding and hacking capability. Accuracy is not really different.

            * I do stand (somewhat) corrected on that 30 to 40 is a bit out of spec: it’s indeed pretty much exactly the limit.

            However, those specifications are largely intended to denote when a watch is faulty and can be returned for replacement or repair, something Seiko clearly wants to avoid on a $350 sale. So the specs are far wider than where most watches come in, even when taking into account very different wearing patterns, temperatures, etc.

            There is a big topic on Turtle accuracy on one of the watch forums, where most people report accuracy well within +/- 10 seconds, with 5-6 seconds off per day being a really common number.

          • Dinkee, H. O.

            It matters not if you’re late for appointments half-way through the week because you’re wearing the Common Man’s Hero watch!

  • I’d love a sapphire crystal and a ceramic bezel on this. Perfect otherwise.

  • dennis

    The SKX and the SRP are the best dive watches out there for the money, i’ve been
    diving with Seiko for 30t tears.

  • Shawn Lavigne

    i see a misaligned chapter ring. my SKX has a misaligned chapter ring. i like these new turtles sort of, but i prefer the looks and movement of the SKX007.

    • Drazen B

      I see dead people sometimes.

  • Berndt Norten

    There is no greater value for the money. I own…seven or eight Seikos. Each one is at the top of its price bracket.

    • TrevorXM

      I don’t think anybody can argue convincingly against that assessment.

      • Berndt Norten

        Thank you Sir!

    • Boogur T. Wang

      Quite true. And really, how bloody accurate, time-wise- does one really need in the real world?
      I have an old Seiko beater (with an abominably stinkly cloth(? ) strap – (quite humid here) that has a 7s36-03JD movement that is + – 5 seconds per week in real world usage.
      I’ve never missed a meeting or been “late” for anything because of it.
      Acuatally going to spend the equal cost (of the watch) on a nice metal bracelet because the strap stinks so much.
      Seiko just does it right.

    • Nick Chang

      No dispute on this one, friend. To me, watches are a right of passage to various stages in life and my Seiko SKX009 was my entry into early adulthood and paved the path to more costly (but not necessarily better) acquisitions. Since then I have owned and/or have kept a few world class timepieces, with my Submariner from 2005 as my last ‘luxury watch’ purchase. There are still a few exquisite pieces on my wish list that I aspire to attain in the near future but I think I’ve kind of come to a full circle with my recent SRPA21, which sums up where I’m now at in life: I’m old enough to appreciate and financially stable enough to afford certain things that I fancy, but I’m also wise enough to appreciate something less costly but with excellent value…and I can also afford to not give a damn that someone may look at this as a ‘downgrade’.

      To put it in the most simple way: I can appreciate a nice steak and lobster dinner with a bottle of good wine equally as a good In-n-Out double cheeseburger, fries, and a beer.

  • SuperStrapper

    Can’t get behind this chubby case. Looks uncommitted.

    • Dinkee, H. O.

      I agree. There’s nothing worse than a chubby case on a watch. Chubbys have a place and a time, after all, and commitment has nothing to do with it!

    • laup nomis

      Half the fun of buying watches is the chase. I love finding a good chubby, chasing it till it’s mine, chubby watch that is…

  • MA

    A nice budget quality watch at a not so budget price.

  • Dinkee, H. O.

    As much as Seiko tries, they have gone too far in trying to please the Common Man and missed the mark entirely on this watch.

    • Jerm Johnson

      I’m common and they’ve pleased me 100%

    • Antjay

      I’m common as fu(k and I believe they have nailed it .

  • Boogur T. Wang

    Very nice review and excellent pics Mr. Stacey.
    Good to see real world use pics in a review.
    Well done!

    • Nick Chang

      And you’re also a gentleman and scholar, Mr.BTW

      • Boogur T. Wang

        I consider myself, and by extension all of the members of this community, blessed to share and learn things about something we have such a great interest in.
        This is a varied group and, for the most part, are very willing to share their knowledge and exp[erience.
        From this, we all do benefit.

        • Nick Chang

          I can certainly sense that in your posts to all topics

  • Gabe Wong

    GREAT piece! Measurements suggest a massive piece, but that lug-to-lug makes for a quirkyly wearable piece. And with the movement upgrade, you’ve simply convinced a new SRP buyer!

  • spiceballs

    Seiko make great watches at reasonable price points with solid movements and good fit. This is no exception. Personally I prefer the Monster hand set/steel bezel, on my wrist now.

  • Nick Chang

    Picked up the PADI SRPA21 on 8/20 and have gauged its 4R36 movement for the pass 2 weeks which is very accurate – I’d say +/-3 sec per week from what I’ve seen so far. A friend recently asked me bluntly why I picked up this piece when I already have a Sub and a Seamaster chrono, and I simply replied “why not?”. I actually have 3 reasons for buying this piece and I’m sure most of you watch aficionados here may better relate than my dull and snobbish friend who thinks any watch under $5k is beneath him.

    First, I’ve always wanted a Seiko ‘turtle’ so this saved me the trouble of looking for a vintage one in decent shape at a decent price…and the prospect of me burglarizing my uncle’s 6105. Secondly, this is sort of a successor to my 25yrs+ old SKX009 that I wore when I was a Marine and through college. Lastly, my wife also likes the blue & red Pepsi scheme which goes well with a lot of my wardrobe of the same colors…but she wouldn’t be too crazy about me buying another Rolex GMT Master II just for this sake.

    I’m overall very pleased with this piece and its excellent value. The accuracy, the lume, the distinct red hour marker dash, and beautiful deep sea blue iridescent dial similar to that of my 16613 Sub. The only thing I would have preferred was I thought it’d great if Seiko also stuck to the ‘bar’ hour marker tab like the original 6105, which I felt would’ve added more distinction to it from many other dive watch out there that use the circular marker. Final thoughts: just a damn good but inexpensive new addition to my flock that can surely hold its own against the other more ‘exquisite’ brethren.

  • Wandi Marco

    I like it, but just curious why the lume on the second hand is on the other side?

    • laup nomis

      I think its assumed that you wouldn’t need the time to the nearest second when either diving or in the dark. But the fact that you can see the second hand moving, means you know the watch is working, hence telling the correct time.
      So its just a ‘funky’ design feature. My skx has the same style second hand.

      • Nick Chang

        That is the minimalistic charm of Seiko’s second hand ‘lollipop’ butt. 😉

      • Correct – that is one of the ISO requirements – 10 points

  • arsenal55

    James, another terrific review of another terrific Seiko dive watch offering. I’ve owned the 775 for a couple of months and find the accuracy to be acceptable and the quality of the watch to be terrific. I’m also a serial watch strap swapper and find the drilled lugs very strap switch friendly. I think the PADI Pepsi will be next in line as I don’t have a Pepsi bezel since I gifted my 009, and I know Seiko divers do not disappoint.

    • Nick Chang

      You should check out the comparison between my PADI Pepsi and my 009 that I just posted up top.


    Good looks and so hard to beat the price.
    The Seiko Prospex S is not an S but an S and P combined 🙂

    • Nick Chang

      It’s actually an ‘X’ formed by the P overlapping the S, hence ‘ProSpeX’ 😉

      • BNABOD

        Right so like I said it is not an S

  • Nick Chang

    To all you Pepsi fans: here’s a few small nuances of the PADI SRPA21 vs the SKX009 that I totally dig and believe it’ll surely convince you to upgrade (see photos):

    1. The PADI’s dial is an iridescent sea blue which really cascades beautifully under sunlight. The SKX ihas a darker matte blue. The PADI’s bezel blue is also lighter than the SKX.

    2. The hour marks on the PADI is red while all the minute lines remain white and the minute hand is also highlighted in red, which all compliments the bezel red quite well, don’t you think?

    3. It’s hard to tell by my amateur iPhone photo, but Ive noticed the hour lume spots are also more prominently outlined than the SKX.

    • laup nomis

      Great pics! When my srp turns up I’m gonna play, and take pictures of it with my skx009 too.

      • Nick Chang

        Please by all means do so and I look forward to seeing it 🙂

  • funNactive

    I have other watches that I dive with including a Seiko Orange Monster. I think that will do for my Seiko dive collection – no desire to upgrade within the Seiko line.
    My new watch on order is a Bronze diver – I think it will be my main diver to work on the patina!

  • Yan

    Great review. Great watch. Have a 779 and will be buying a black insert for it shortly to change it up a bit. Just wondering what brand of Grey NATO that is that you wear it on. Looks like a Phoenix maybe?

  • Palettj

    Want a great deal? Go to, MSPR $475 its currently on sale for $380. Open a Kohls charge card, get 30% off of sale price. Get the SRP777 delivered to your door for $285!!!! YOU ARE WELCOME!!!

  • Yanko

    Incredible watch. I bought the Pepsi Dial version. I also have Blancpain Fifty Fathoms Bathyscaphe Automatic 43mm version. This comment may sound purely idiotic and brainless, but I find wearing the Seiko way more pleasant. And my friends like the Seiko better. I do too.

    • SekritDox

      There’s nothing wrong with liking affordable watches more than the so-called luxury ones.

  • Ryan Burbridge

    I just picked up the SRPB11. “Blue lagoon” and love it. Upgraded from 7002-700j. appreciate the hacking seconds and hand wind ability. Truly great watches for Seiko fans.

  • Ryan Burbridge
  • Ryan Burbridge
  • Jorge Robles

    I am tempted to get the newest version of a watch that I have from 1982. By the way, the model number to which the author refers as “6309” is not the model number of the watch, it is the caliber number that was used at the time. Seiko uses an “xxxx-xxxx” system to identify their models, the first 4 are for the movement and the last 4 are for the case, regardless of the type of bracelette. My own copies (3 of them) are “6309-7040”. Well, the new edition is using a movement that is by far superior to the 7s26. I consider the 6309 superior to the 7s26 even though both were easy to service, but this 4r36 movement appears better design and built that either the previous ones, specially with the hacking and winding systems. Yes, I do my own watchmaking and service all my watches with my own set of tools from Bergeon so I think I know what I am talking about. I have been able to install rebuilt 6309’s on models using the 7s26, and those models wear and perform better with the older movement. The 6309 hairspring is more malleable and can be repaired more easily than the one in the 7s26, and so is the the same when demagnetizing the movements, the 6309 responds better than the 7s26 (my experience). I hope to get a new Seiko SPX777 so I can play with that movement and see what Seiko did to enable those two features to their movements. But again, Seiko has a WINNER here!!!!!

  • Antjay

    Waiting for my “Batman” to arrive . Got it for such a great price , I will probably mod it with a double coated Ar sapphire crystal .
    I wish my budget had stretched to the Thailand only Zimbe version , one of the best looking dive watches for any money IMHO .

  • Christian

    Somehow, it would feel much more sensible and appropriate going diving with a moderately priced, yet good quality dive watch than a Sub or a Seamaster. I guess the prices of the Swiss luxury brands have reached a level, where it would only make sense to use their pieces as desk divers.