Specifications: MOVEMENT : Caliber Number :4R36 Movement Type :Automatic with manual winding capacity Duration :Approx. 41 hours EXTERIOR : Case Material :Stainless steel Crystal :Hardlex LumiBrite :Lumibrite on hands and indexs OTHER DETAILS : Water Resistance :10 bar(100m) Case Size Thickness: 13.4 ㎜ Diameter: 42.5 ㎜ Length: 46 ㎜ Other Specifications: Screw case back See-through case back Three-fold clasp with secure lock Unidirectional rotating bezel Other Features 24 jewels Day/Date display Stop second hand function