Seiko 5 Sports SRPK25

38.0 mm, 4R36 automatic. Discontinued.

Japan: SBSA233
4R36
38.0 × 44.2 mm
100 m
Hardlex

Case drawn to scale from Seiko's published dimensions: top view with lugs, and side view.

Specifications

Movement: Seiko 4R36, automatic with hand winding
Accuracy: +45 to -35 sec/day
Case diameter: 38.0 mm
Lug-to-lug: 44.2 mm
Thickness: 12.1 mm
Lug width: 20 mm
Crystal: Hardlex
Water resistance: 100 m
Magnetic resistance: 4,800 A/m
Weight: 72 g
Strap: Nylon
Band length (max): 225 mm
Lume: LumiBrite on hands and index(es)
Features: LIMITED EDITION on the case back, See-through & Screw case back, Serial number engraved on the case back, Unidirectional rotating bezel
Series: Seiko 5 Sports, SKX series
Style: SKX Sense Style (2019 lineup)

Same case, other dials

Identical case, movement and dimensions; only the dial, bezel or finish differs.

Other watches on the 4R36

Every 4R36 watch

Questions

What is the Japanese version of the Seiko SRPK25?

In Japan the SRPK25 is sold as the SBSA233: the same 4R36 calibre, the same 38.0 mm case and 100 m water resistance. Only the reference differs by market.

What movement is in the Seiko SRPK25?

The SRPK25 runs on the Seiko 4R36, an automatic movement that can also be wound by hand. See the 4R36 page for its specs and every watch built on it.

Does the Seiko SRPK25 have a sapphire crystal?

No. The SRPK25 has a Hardlex crystal. Hardlex is Seiko's hardened mineral glass: tougher than plain mineral glass, softer than sapphire.

How water resistant is the Seiko SRPK25?

100 m (10 bar). That covers swimming and snorkelling; it is not a certified diver's watch unless Seiko says so.

What is the lug width of the Seiko SRPK25?

20 mm. Any 20 mm strap fits.