Seiko 5 Sports Automatic Watch SRPK31 SRPK31K SRPK31K1

Caliber: 4R36
Jewels: 24
Power reserve: 41 hours
Index Specification: LumiBrite
Functions: Day/Date display
Stop seconds hand function
Movement: Automatic with Manual Winding
Water-resistant to 10 bar, 100 meters (330 feet)

Thickness: 12.1mm
Diameter: 38.0mm
Lug-to-lug: 44.2mm

Unidirectional rotating beze
Three-fold clasp with secure lock
See-through & Screw case back