Hamilton Khaki Aviation X-Wind Stainless Steel / Blue Ref. H77506540

The Hamilton Khaki Aviation X-Wind Autochrono H77506540 debuted in 2025. This watch has a stainless steel case of 44mm with a thickness of 15.6mm, which houses the automatic caliber H-21. The dial is blue, featuring an internal rotating bezel, day-date indication, and chronograph counters. The H-21 movement is based on the ETA 7750 architecture. It features automatic winding, a frequency of 28,800 vph, and a power reserve of 60 hours. Functions include hours, minutes, small seconds, chronograph, day, and date. The case is fitted with a sapphire crystal, see-through back, and screw-down crown. Water resistance is specified at 100 meters.