Editor's choice

Seiko Prospex Samurai SRPB51

Add to wishlistAdded to wishlistRemoved from wishlist 0
Expert ScoreRead review

Seiko Prospex Samurai SRPB51 Specifications

Brand, Seller, or Collection Name SEIKO
Model number SRPB51
Part Number SRPB51
Model Year 2017
Display Type Analog
Case diameter 43.8 millimeters
Case Thickness 12.00
Band Material Stainless Steel
Band width 22 millimeters
Band Color Silver
Dial color Black
Calendar Date
Item weight 11.2 Ounces
Movement Swiss Automatic
Water resistant depth 200 Meters

The Seiko Prospex Samurai SRPB51 watch is a reliable timepiece in terms of timekeeping and diving with a modern aesthetic. This sleek timepiece designed with black and gray and a textured dial run with a 41-hour power reserve, 23-jewel automatic-self-wind movement that can also be hand wound and hacked. Specially crafted to meet every diver’s needs, the Seiko Prospex Samurai SRPB51 has a 200-meter water-resistance, unidirectional bezel with a luminous pip, large and luminous hands and hour markers, screw-down crown and screw-down case back. For the prevention of scratches, it is constructed with Seiko’s very own material especially made durable to resist scratches called, Hardlex crystal for its dial window. With its chic modern design, this watch not only makes a great diver’s watch but also a fabulous watch that will match perfectly with your outfits, whether casual or more dressed up.

The Seiko Prospex Samurai SRPB51 design

The new Seiko Prospex Samurai SRPB51 borrows 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.

Right off the bat, you will notice the Seiko Prospex Samurai SRPB51 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 instance, the Seiko Prospex Samurai SRPB51 unidirectional bezel has a sleeker profile and use finer, crisper markings.

The Seiko Prospex Samurai SRPB51 dial

Just with the bezel, the dial features intricate markings including sub-second hash marks 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 is not just any old entry-level Seiko diver. The Seiko Prospex Samurai SRPB51is a very capable tool made to be used by professional divers. The huge hour hand is 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. You can’t really go wrong with any of the 4 styles, each one uses a cohesive and attractive color combination.

The Seiko Prospex Samurai SRPB51 functionality & movement

The Seiko Prospex Samurai SRPB51 is part of Seiko’s Prospex line, watches designed to be so capable that professionals can use them in the field. The Seiko Prospex Samurai SRPB51 is designed for professional divers.

The Seiko Prospex Samurai SRPB51 uses Seiko 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.

The Seiko Prospex Samurai SRPB51 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 Seiko Prospex Samurai SRPB51 tends to wear slightly smaller than its nearly 44mm wide specification. Stainless steel for the case, and either stainless steel or silicone for the bands. unlike the old version of the Samurai, there is no Titanium option for the case.


9Expert Score
Seiko Prospex Samurai SRPB51
Seiko Prospex Samurai SRPB51
Seiko Prospex Samurai SRPB51 besides the water resistance, legibility is arguably the most important aspect of a dive watch, and the thick bold hands and indices make this among the most legible watches in dive watch collection.
  • A combination of sophisticated design and sturdy mechanism
  • Might be too thick for some people