A sporty yet refined design, this Hamilton Khaki Aviation Pilot Pioneer is inspired by the Model 23, a cutting-edge pocket watch used by the US military during WWII. This timepiece is full of character, a distinctive aesthetic and ready to fly. At A Glance  Presented on a brown calf leather strap with pin buckle 38mm stainless steel case with a water resistance of 100m Black textured dial with ultra-legible numerals Cathedral style hands Sapphire crystal glass Powered by an automatic movement 80-hour power reserve