Seiko SRPHK53K1

Caliber Number 4R36 Movement Type Automatic with manual winding Duration Approx. 41 hours Jewels 24 Functions Stop seconds hand function Day/Date display Case Material Stainless steel Case Size Thickness: 11.5mm Diameter: 40.0mm Lug-to-lug: 44.6mm Crystal Hardlex LumiBrite Lumibrite on hands and index(es) Clasp Three-fold clasp with push button release Lug width 20 Water Resistance 10 bar Weight 142.0 Features Three-fold clasp with secure lockSee-through & Screw case back