Seiko 5 Sports SRPJ81
Black dial, 36.4 mm, 4R36 automatic.
- Japan: SBSA197
- 4R36
- 36.4 × 44.4 mm
- 100 m
- Hardlex
- $315
Specifications
- Movement
- Seiko 4R36, automatic with hand winding
- Accuracy
- +45 to -35 sec/day
- Case diameter
- 36.4 mm
- Lug-to-lug
- 44.4 mm
- Thickness
- 12.5 mm
- Lug width
- 18 mm
- Case
- Stainless steel
- Crystal
- Hardlex
- Water resistance
- 100 m
- Magnetic resistance
- 4,800 A/m
- Weight
- 114 g
- Band length (max)
- 205 mm
- Clasp
- Three-fold clasp with push button release
- Lume
- LumiBrite on hands and index(es)
- Dial
- Black
- Features
- See-through & Screw case back, Three-fold clasp with secure lock
- Released
- 2023-01
- Series
- Seiko 5 Sports, Field series
Same case, other dials
Identical case, movement and dimensions; only the dial, bezel or finish differs.
Other watches on the 4R36
Questions
What is the Japanese version of the Seiko SRPJ81?
In Japan the SRPJ81 is sold as the SBSA197: the same 4R36 calibre, the same 36.4 mm case and 100 m water resistance. Only the reference differs by market.
What movement is in the Seiko SRPJ81?
The SRPJ81 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 SRPJ81 have a sapphire crystal?
No. The SRPJ81 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 SRPJ81?
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 SRPJ81?
18 mm. Any 18 mm strap fits.