Hamilton Khaki Aviation Pilot Pioneer Mechanical H76419931 100M Men's WatchA British classic revived by Hamilton, it was originally made for the Royal Air Force, 1973. Now, it’s powered by the H-50 hand-winding movement, storing 80 hours’ worth of running power. The Khaki Aviation Pilot Pioneer reinterprets the vintage military watch, produced for the British Royal Air Force in 1973. It is a military/aviation watch with some real character built-in.