Prospex Sea Turtle

Ref. SRPE93 · “Turtle”

Case diameter: 45 mm; Manufacturer spec
Lug-to-lug: 47.7 mm; Measured in a published review
Thickness: 13.4 mm; Manufacturer spec
Lug width: 22 mm; Manufacturer spec

Retail price $525 (US, Oct 2026)

Your wristIdeal fit

Wrist flat: 55.1 mmLug-to-lug: 47.7 mm

How the Prospex Sea Turtle wears

Its lugs add only 2.7 mm to the 45 mm case, against 7.1 mm typical across the almanac, so it wears smaller than its diameter suggests.

On our fit model it sits best on wrists from 6.75" to 8" (17.1–20.3 cm); below 6.75" the lugs start to reach the edge of the wrist.

At 13.4 mm thick it is thicker than 70% of the 79 other dive watches we've measured, so expect it to sit tall on the wrist.

Its 22 mm lug width is one of the most common strap sizes; 27 other watches here share it, so aftermarket straps are easy to find.

Will the Prospex Sea Turtle fit your wrist?

With a 47.7 mm lug-to-lug, here is how it wears across common wrist sizes. We estimate the flat top of each wrist from its circumference; measure yours for a closer answer in the fit finder.

Wrist	Flat width (est.)	Fit
6"	47.2 mm	Lugs overhang
6.5"	51.2 mm	Snug, lugs near the edge
7"	55.1 mm	Ideal fit
7.5"	59.1 mm	Ideal fit
8"	63 mm	Ideal fit

Specifications

Reference: SRPE93
Collection: Prospex
Status: In production
Case material: stainless steel
Crystal: Hardlex
Water resistance: 200 m
Bezel: unidirectional rotating
Dial: black
Strap / bracelet: silicone strap
Weight: 124 g
Style: Dive

Movement

Caliber: Seiko 4R36
Type: automatic
Power reserve: 41 hours
Frequency: 21,600 vph (3 Hz)
Jewels: 24
Accuracy: +45/-35 s/day

4 other watches use the Seiko 4R36

Takes 22 mm straps. See other 22 mm watches and straps.

More Prospex references

Watches that wear the same size

Other watches within 1.5 mm of its lug-to-lug.

Same 22 mm lug width

All 22 mm watches

These take the same straps as the Prospex Sea Turtle.