Khaki Aviation Day Date AutoHow it felt to be an early aviator, a pioneering pilot flying an airplane at the turn of the twentieth century is something that cant be recreated, but Hamilton can give you the look created using modern materials including stainless steel and sapphire crystal. Add an automatic movement and a perfectly proportioned 42mm case for a new take on a vintage timepiece Reference H64645531 Caliber H 40 Collection Khaki Aviation Movement Automatic Watch