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