Seiko SRPE03K1

Specification:
Caliber Number: 4R36
Movement Type: Automatic with manual winding capacity
Crystal: Hardlex Crystal
LumiBrite: Lumibrite on hands and indexs
Crystal Coating: Anti-reflective coating on inner surface
Clasp: Three-fold clasp with secure lock , push button release with extender
Water Resistance: 20 bar (200 meter) Diver's (Water-proof)
Diameter: 47.7 mm

Other specifications:
-Screw case back
-Screw-down crown
-Three-fold clasp with secure lock
-Unidirectional rotating bezel

Other features:
-24 jewels
-Day/Date display
-Stop second hand function