Seiko Prospex SRP639K1 Automatic

Caliber Number 4R36
Movement Type Automatic with manual winding
Duration Approx. 41 hours
Case Material Stainless steel
Crystal Hardlex
Lumibrite on hands and indexes
Band Material Silicone
200m / 660ft diver's
Case Size
Thickness: 13.8 ?
Diameter: 48 ?
Other specifications
Screw-down crown
Unidirectional rotating bezel
Other features
24 jewels
Day/Date display
Stop second hand function