Innovation, adventure and precision: these are the characteristics of a timepiece sought after by aircraft pilots and always present in Hamilton creations. The Khaki X-Wind is the first watch to house the drift angle calculator inside, a device that allows you to accurately measure cross winds and their effects on aircraft trajectory. The technical design and the automatic movement are particularly appreciated also on the mainland and transform the model into the ideal co-pilot for every day. The H-21 is a powerful automatic chronograph movement with an enhanced 60-hour power reserve, making it perfect for the needs of the sportiest models. The H motif on the oscillating weight leaves no doubt about who made this movement.