Mechanical | 43mm | H76709530 Inspired by the Model 23, a cutting-edge pocket watch used by U.S. soldiers during WWII, the Khaki Pilot Pioneer's distinctive design is a tribute to Hamilton's aviation and military heritage. The sporty yet refined pilot watch retains an indisputably technical feel with its handwinding mechanical movement, bi-directional rotating bezel and prominent winding crown. Available with a sleek stainless steel or unique bronze case, this 43mm timepiece is ready to fly. Watch Reference : H76709530 Caliber : ETA 6498-1 Collection : Khaki Aviation Movement : Mechanical Case size : 43mm Dial color : Black Case material : Bronze and Titanium Crystal : Sapphire Lug width : 20mm Power reserve : 50-hour power reserve Water Resistance : 10 bar (100m)/145 psi (328ft) Open Case Back : Yes Bracelet/Strap Strap reference : H6007671101 Strap type : Calf leather Buckle type : Pin buckle Buckle width : 18mm