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 Band Material :Nylon 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 OTHER FEATURES : 24 jewels Day/Date display Stop second hand function