Current Production
Seiko 5 Sports
SEIKO SRPK87
MSRP
$415 USD
Verified Aug 18, 2026
Case diameter37.4 mm
Lug-to-lug44.7 mm
Thickness12.5 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
DialBlue
Bracelet or strapStainless steel bracelet
Specifications as published by Seiko →
Last verified Aug 18, 2026