Seiko 5 Sports SRPG31
Gray dial, 39.4 mm, 4R36 automatic.
- Japan: SBSA115
- 4R36
- 39.4 × 48.1 mm
- 100 m
- Hardlex
- $315
Specifications
- Movement
- Seiko 4R36, automatic with hand winding
- Accuracy
- +45 to -35 sec/day
- Case code
- 4R36-10A0 engraved on the caseback
- Case diameter
- 39.4 mm
- Lug-to-lug
- 48.1 mm
- Thickness
- 13.2 mm
- Lug width
- 20 mm
- Case
- Stainless steel
- Crystal
- Hardlex
- Water resistance
- 100 m
- Magnetic resistance
- 4,800 A/m
- Weight
- 77 g
- Strap
- Nylon
- Band length (max)
- 200 mm
- Lume
- LumiBrite on hands and index(es)
- Dial
- Gray
- Features
- See-through & Screw case back
- Released
- 2021-04
- Series
- Seiko 5 Sports, Field series
Same case, other dials
Identical case, movement and dimensions; only the dial, bezel or finish differs.
- SRPG27 JP SBSA111 Black · 39.4 mm · 4R36 $315
- SRPG29 JP SBSA113 Blue · 39.4 mm · 4R36 $315
- SRPG35 JP SBSA117 Black · 39.4 mm · 4R36 $315
- SRPG37 Black · 39.4 mm · 4R36 $315
- SRPG39 JP SBSA119 Blue · 39.4 mm · 4R36 $315
- SRPG41 JP SBSA121 Black · 39.4 mm · 4R36 $350
- SRPG42 Green · 39.4 mm · 4R36
- SRPH33 JP SBSA143 Black · 39.4 mm · 4R36 $350
- SBSA139 39.4 mm · 4R36 Discontinued
- SBSA277 39.4 mm · 4R36 Discontinued
- SRPG33 39.4 mm · 4R36 $275 Discontinued
- SRPH29 JP SBSA141 Green · 39.4 mm · 4R36 $275 Discontinued
Other watches on the 4R36
Questions
What is the Japanese version of the Seiko SRPG31?
In Japan the SRPG31 is sold as the SBSA115: the same 4R36 calibre, the same 39.4 mm case and 100 m water resistance. Only the reference differs by market.
What movement is in the Seiko SRPG31?
The SRPG31 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 SRPG31 have a sapphire crystal?
No. The SRPG31 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 SRPG31?
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 SRPG31?
20 mm. Any 20 mm strap fits.