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Seiko model family

Seiko Turtle

Our base has 5 Seiko Turtle references (SRP775, SRP777, SRPA21, SRPD21 and SRPE93): cases of 45 mm, 47.7–48 mm lug to lug, and 13–14 mm thick. They run on the Seiko 4R36 movement, take 22 mm straps, are water resistant to 200 m, and have a Hardlex crystal.

Sources checked · How we source numbers

Seiko Turtle 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 Turtle references: case, lug to lug, thickness, lug width, movement and water resistance
ReferenceCaseLug to lugThicknessLug widthMovementWater resistance
SRP77545 mm[1]—13.4 mm[1]22 mm[1]Seiko 4R36[1]200 m[1]
SRP77745 mm (44.3 mm measured)[3][4][2]48 mm (47.25 mm measured)[3][2]14 mm (slightly over 13mm mm measured)[2]22 mm[2][4]Seiko 4R36[2][3][5][6]200 m[2]
SRPA2145 mm[7]—13.4 mm[7]22 mm[7]Seiko 4R36[7]200 m[7]
SRPD2145 mm[8]47.7 mm[8]13 mm[8]22 mm[8]Seiko 4R36[8]200 m[8]
SRPE9345 mm[9]—13.4 mm[9]22 mm[9]Seiko 4R36[9]200 m[9]
Why these references are listed · each one is named as part of the family in our data or a cited source
  • SRP775: “SRP775 “Turtle”” (Strap-size table, row for the reference)[4]
  • SRP777: In our data: nickname “Turtle”.
  • SRPA21: “SRPA21, SRPE99, SBDY017 “Turtle PADI”” (Strap-size table, row for the reference)[4]
  • SRPD21: “SRPD21 (Save the Ocean “Great White Shark”)” (Fits Models list on the Turtle sapphire-crystal page, group 'Modern Reissue Series')[10]
  • SRPE93: “the Seiko Turtle SRPE93 does not have the beveling on the day/date window” (Review text)[3]

The King Turtle (SRPE03 and later) is its own family.

Seiko Turtle movement and strap size

Related families

All Seiko watches with sizes

Seiko Turtle questions

What movement is in the Seiko Turtle?

All 5 references use the Seiko 4R36 (automatic).

What size is the Seiko Turtle?

Across the references the case is 45 mm across, 47.7–48 mm lug to lug and 13–14 mm thick. The table above has each reference's own sizes.

What strap size does the Seiko Turtle take?

All 5 references take a 22 mm strap.

How water resistant is the Seiko Turtle?

All 5 references are rated 200 m.

What crystal does the Seiko Turtle have?

All 5 references have a Hardlex crystal.

Which references are in the Seiko Turtle family?

SRP775, SRP777, SRPA21, SRPD21 and SRPE93. 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. 1Seiko Watch Corporation — SRP775 product page (Prospex), seikowatches.com ph-en · html · read
  2. 2WatchClicker — Seiko Turtle SRP777 Review - compared to SKX007 · html · read
  3. 3Exquisite Timepieces — Seiko SRP777 vs SRPE93: Which is the Superior Turtle? · html · read
  4. 4StrapsCo — Seiko Lug Widths & Strap Sizes (reference table) · html · read
  5. 5Watchoutz — Seiko Prospex Mechanical Automatic Diver's 200M Turtle SRP777 (product page) · html · read
  6. 6Belmont Watches — Seiko Prospex Diver Turtle SRP777 (pre-owned listing) · html · read
  7. 7Seiko Watch Corporation — SRPA21 product page (Prospex), seikowatches.com ph-en · html · read
  8. 8Seiko Watch Corporation — SRPD21 product page (Prospex), seikowatches.com global-en · html · read
  9. 9Seiko Watch Corporation — SRPE93 product page (us-en), seikowatches.com · html · read
  10. 10Crystaltimes — SRP Turtle Double Dome Sapphire Crystal - CT057 · html · read