Khaki Aviation Pilot Pioneer Mechanical Chrono H76409540

Rugged and reliable, the Khaki Pilot Pioneer Mechanical Chronograph pays homage to Hamilton's vintage military aviation watches. Powered by our exclusive hand-wound H-51-Si movement, this timepiece boasts a 60-hour power reserve and a stunning Aviation Blue dial with a sunray finish. The H-51-Si is a mechanical chronograph movement featuring a state-of-the-art balance spring made from the anti-magnetic material silicon for enhanced resistance to extreme atmospheric conditions. With an extended 60-hour power reserve, this hand-wound caliber keeps and measures time via an iconic dial complete with start/stop and reset pushers. With no rotor and no date function, this interactive movement brings modern reliability and precision to signature, vintage-inspired design.

Source: Hamilton website, last updated Mar 2026