Caliber No 4R36 Drive system Mechanical automatic-winding (with hand winding) accuracy Day difference +45 seconds to -35 seconds Driving period Approximately 41 hours last for maximum hoisting Exterior Case material Stainless steel (partly hard coating) Back cover: Stainless steel and glass Glass material Hard rex Lumi Bright Available (Needle/Index) One-push three-fold method Other specifications waterproof Reinforced waterproof for daily life (10 ATM) Magnetic resistance Yes Case size Thickness: 11.5 mm Side: 40 mm Vertical: 44.6 mm weight 143.0 g Arm length (longest) 200 mm Other specifications See-through back Screw back (Due to manufacturing reasons, the direction of the back lid may differ from one to another) Double lock Back lid "LIMITED EDITION" notation Other features With calendar (date/day of the week) function 24 jewels Second hand stop function. I do not mark merchandise values below value or mark items as "gifts" - US and International government regulations prohibit such behavior. I accept return items up to 30 days after the item has arrived ONLY IF it's NOT used and not as described. I don't accept any return without my approve.