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Home » Watch Reviews » Seiko Prospex Samurai SRPB51 Automatic Dive Watch Review

Seiko Prospex Samurai SRPB51 Automatic Dive Watch Review

October 28, 2017 by Cody Brown 7 Comments — Updated on January 22, 2024

Seiko Prospex Samurai Automatic Dive Watch Review

For all its capability and panache, the coolest part of Seiko’s new line of dive watches might just be their nickname: Samurai. There are a lot of Seiko models that have been given sweet nicknames, but I don’t think any can match this one for sheer awesomeness. That’s not all this watch has to offer, though, so let’s not end the review just yet.

Seiko first introduced the Samurai in 2004, but only made the watch for a few years before halting production. Seiko diver enthusiasts have been clamoring for a new Samurai ever since, and Seiko is finally obliging. The re-imagined Samurai was teased earlier this year with a limited-edition model in a “Blue Lagoon” color scheme. Only 6,000 Blue Lagoon Samurais were offered to the public, and they sold out quickly. Well, now Seiko has released a full line of Samurais and they will let you buy as many as you like. Let’s explore the finer aspects of the current line of Samurais to see if all of the hype is justified.

Design

The new Samurais borrow heavily from the design of the original, with some subtle-yet-tasteful updates. 4 variants of the Samurai are currently available, including a blue dial/blue bezel, black dial/black bezel, a blue dial with a “Pepsi” bezel, and a striking gold-on black design.

SRPB51 timepiece

Right off the bat, you’ll notice the Samurai has a more angular case design than the popular SKX line of dive watches. The crown uses a very attractive and technical-looking diamond texture pattern instead of the more common ridge pattern seen on most Seiko divers. Compared to the bezel on the SKX007, for example, the Smaurais’ unidirectional bezels have a sleeker profile and use finer, crisper markings.

out in the sun

Just as with the bezel, the dial features intricate markings, including sub-second hashmarks on the outer chapter ring. A crisp and intricate grid pattern, called Clou de Paris, gives the dials a technical, almost three-dimensional characteristic. The Prospex “X” is featured on the dial as well, so that those in the know will recognize that this isn’t just any old entry-level Seiko diver. No sir, this watch is a very capable tool made to be used by professional divers. I love the huge hour hand, one of the new design touches compared to the original Samurai. This arrow-shaped hand has a nice, hefty feel to it as it consists of about 90% tip and 10% shaft. I know where your mind went on that last sentence, too; straight to the gutter, but I assure you that those are real arrow terms.

You really can’t go wrong with any of the 4 styles; each one uses a cohesive and attractive color combination. With such a classy design, few divers in this price range are better suited for use as a dress watch.

SRPB51 Functionality

The Samurai is part of Seiko’s Prospex line: Watches designed to be so capable that professionals can use them in the field. We aren’t talking about professional accountants here, either. No, Prospex are designed for professionals who whose “field” is either underwater, in an airplane, or on the summit of a mountain, so you know these watches will survive pretty much anything you throw at them.

close up of dial

The Samurai uses Seiko’s caliber 4R35 automatic movement, which beats at 21,600 vph. This movement also incorporates 23 jewels into its design and boasts a reasonable 41-hour power reserve. Features In addition to the date function, the 4R35 also gives the watch hacking and hand-winding capability, placing it a notch above lesser automatic movement.

Like oh-so-many Seikos, Samurais use Hardlex for their crystals. Superb lume on the hour markers, hands, and bezel pearl makes the watch readable from across a dark room.

A screwed-down case back and 3 o’clock crown help give the watch a 200-meter water resistance rating, which should be plenty sturdy for just about any recreational or professional diving. The Samurai tends to wear slightly smaller than its nearly 44-millimeter wide specification, so don’t let that turn you away. Stainless steel for the case, and either stainless steel or silicone for the bands. Unlike the old versions of the Samurai, there is no Titanium option for the case.

Final Thoughts

With an MSRP hovering around $500 (a little more or a little less, depending on the model), the new Samurai line is sure to attract plenty of attention. I have to say, I can’t blame anyone for pulling the trigger on one of these watches, either. Defined by its combination of sophisticated design and sturdy mechanicals, the Samurai promises to be a force to reckon with in its mid-tier diver category. In striving to be as objective as possible, I have scoured these things to find any faults, and I must confess that there really aren’t any apparent issues with them. I guess this isn’t a surprise, as Seiko has such a long history of making fine diving watches and at this point they really know what they are doing.

Filed Under: Men's, Sports, Watch Reviews Tagged With: Automatic Watches, Dive Watches

About Cody Brown

Cody appreciates watches for the way style and utility intertwine in a very similar fashion to automobiles, creating an emotional allure that few other items can match.

Comments

  1. Todd says

    April 9, 2018 at 7:27 am

    I purchased a seiko samurai brand new in late 2007.

    After several years of persistance, I eventually stopped wearing it because it kept such lousy time. It would gain a minute a day without fail, and by the end of the week, would be 7 minutes fast. I took it off in 2014 and haven’t worn it since, a shame really because its a great looking watch. But, you know… who needs a watch that doesn’t keep time? Anyway… I now wear a $100 G Shock – a much better watch all round.

    Reply
    • Kevin says

      August 2, 2018 at 11:12 pm

      I have a similar watch from Seiko that gains almost a minute everyday. I placed it in the upright position/crown up whenever i take it off at home so the watch sits in that position 8-16 hours a day, and that slows it down to about 10-20 seconds a day. Still quite fast but i can accept that.

      Probably it is magnetized and a decent watchmaker can demag it for a minimal fee.

      Reply
      • Matt says

        August 2, 2018 at 11:17 pm

        Funny enough I do the exact same thing with my Rolex Air-king. It’s a great little trick!

        Reply
        • Keith Smith says

          August 5, 2018 at 9:59 pm

          Every clock minds it’s own business. If you want your timepiece to sing in harmony with others, get quartz.

          Reply
    • Charles szasz says

      August 3, 2018 at 7:50 pm

      Did you ever bother to have it serviced properly?

      Reply
  2. Frank says

    February 26, 2019 at 11:06 pm

    I am about to order the SRPB51 from Amazon. I see one for $289 dollars and one for $325. The first one is model 2017 and the later is 2018. Are there any differences between the two years? Thanks.

    Reply
  3. j bissett says

    August 25, 2019 at 9:25 am

    I bought this seiko prospex samurai watch and it has been back to seiko twice for appalling time keeping and back again because the second hand fell off! absolute rubbish watch so disappointed with this brand now as the quallity has slipped away i have had an old kinetic seiko still going after 30 years but i would never buy another seiko as the quality is rubbish now , shame

    Reply

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