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Seiko model family

Seiko Samurai

Our base has 3 Seiko Samurai references (SRPB49, SRPB51 and SRPD23): cases of 43.8–44 mm, 48.4 mm lug to lug, and 13–13.4 mm thick. They run on the Seiko 4R35 movement, take 20 mm or 22 mm straps (by reference), are water resistant to 200 m, and have Hardlex or mineral glass crystals.

Sources checked · How we source numbers

Seiko Samurai references compared

Each figure carries the number of its source; open a reference for every size, the drawing and the full list of sources.

Seiko Samurai references: case, lug to lug, thickness, lug width, movement and water resistance
ReferenceCaseLug to lugThicknessLug widthMovementWater resistance
SRPB4944 mm[1]—13 mm[1]20 mm[1]Seiko 4R35[1]200 m[1]
SRPB5143.8 mm[2]—13.4 mm[2]22 mm[2]Seiko 4R35[2]200 m[2]
SRPD2343.8 mm[3]48.4 mm[3]13.4 mm[3]22 mm[3]Seiko 4R35[3]200 m[3]
Why these references are listed · each one is named as part of the family in our data or a cited source
  • SRPB49: “Seiko Prospex Samurai Blue srpb49” (Dealer listing title)[1]
  • SRPB51: “SAMURAI – SRPB09 Blue Lagoon – SRPB51 Black” (Fits Models list, 'SAMURAI' group)[4]
  • SRPD23: “SRPD23 “Samurai STO Great White Shark”” (Strap-size table, row for the reference)[5]

The King Samurai (SRPE33 and later) is its own family.

Seiko Samurai movement and strap size

Related families

All Seiko watches with sizes

Seiko Samurai questions

What movement is in the Seiko Samurai?

All 3 references use the Seiko 4R35 (automatic).

What size is the Seiko Samurai?

Across the references the case is 43.8–44 mm across, 48.4 mm lug to lug and 13–13.4 mm thick. The table above has each reference's own sizes.

What strap size does the Seiko Samurai take?

The lug width depends on the reference: 20 mm and 22 mm. 20 mm (SRPB49); 22 mm (SRPB51 and SRPD23).

How water resistant is the Seiko Samurai?

All 3 references are rated 200 m.

What crystal does the Seiko Samurai have?

It depends on the reference: Hardlex (SRPB51 and SRPD23); mineral glass (SRPB49).

Which references are in the Seiko Samurai family?

SRPB49, SRPB51 and SRPD23. A reference is listed only when its own data or a cited source names it as part of the family; the list under the table shows what names each one.

Sources

Documents checked · Report a wrong number

  1. 1Right Time International — SRPB49 listing, Right Time (Denver), dealer spec block (pre-owned listing, sold out 2/2021) · html · read
  2. 2Seiko Watch Corporation — SRPB51 product page (Prospex), seikowatches.com ph-en · html · read
  3. 3Seiko Watch Corporation — SRPD23 product page (Prospex), seikowatches.com global-en · html · read
  4. 4Crystaltimes — SRP Turtle Double Dome Sapphire Crystal - CT057 · html · read
  5. 5StrapsCo — Seiko Lug Widths & Strap Sizes (reference table) · html · read