Current Production
Seiko 5 Sports
SEIKO SRPG31
MSRP
$315 USD
Verified Aug 18, 2026
Case diameter39.4 mm
Lug-to-lug48.1 mm
Thickness13.2 mm
Case materialStainless steel
CrystalCurved Hardlex crystal
Water resistance100 m
MovementAutomatic, Caliber 4R36, 21,600 vibrations per hour, 24 jewels, Power reserve: approximately 41 hours
Calibre4R36
Power reserve41 hours
DialGray
Bracelet or strapBlue-gray nylon strap
Specifications as published by Seiko →
Last verified Aug 18, 2026