Specifications(SRPE51K1) : 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 Clasp :Three-fold clasp with push button release OTHER DETAILS Water Resistance :10 bar(100m) Case Size Thickness: 11.5 ㎜ Diameter: 40 ㎜ Length: 44.6 ㎜ Other Specifications Screw case back See-through case back Three-fold clasp with secure lock OTHER FEATURES 24 jewels Day/Date display Stop second hand function