Specifications
- Movement
- Seiko 4R36, automatic with hand winding
- Accuracy
- +45 to -35 sec/day
- Case diameter
- 37.4 mm
- Lug-to-lug
- 44.7 mm
- Thickness
- 12.5 mm
- Case
- Stainless steel, see-through case back
- Crystal
- Hardlex
- Water resistance
- 100 m
- Magnetic resistance
- Magnetic resistant
- Weight
- 125 g
- Band length (max)
- 215 mm
- Clasp
- One-push three-fold clasp
- Lume
- LumiBrite on hands and index(es)
- Features
- Extra calfskin strap included, LIMITED EDITION on the case back, See-through & Screw case back, Serial number on the case back
- Released
- 2025-09
- Series
- Seiko 5 Sports, SNXS series
Same case, other dials
Identical case, movement and dimensions; only the dial, bezel or finish differs.
Other watches on the 4R36
Questions
What movement is in the Seiko SBSA317?
The SBSA317 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 SBSA317 have a sapphire crystal?
No. The SBSA317 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 SBSA317?
100 m (10 bar). That covers swimming and snorkelling; it is not a certified diver's watch unless Seiko says so.