Caliber Number: 4R36 Movement Type: Automatic with manual winding Power reserve: Approx. 41 hours Jewels: 24 Stop second hand function Day/Date display (English and Japanese Kanji Day Wheel (switchable)) Case Material: Stainless steel (hard coating) Case Size: Thickness:13.1mm, Diameter:39.4mm, Lug-to-lug:48.0mm Crystal: Curved Hardlex Band Material: Nylon Distance between lugs: 20mm Water Resistance: 10 bar Weight: 76.5g See-through case back Screw case back