Hamilton H-30

Hamilton's Powermatic 80 day-date movement based on ETA C07.621, which evolved from the ETA 2836-2. Features 80-hour power reserve achieved through lower 21,600 vph frequency and Hamilton-branded rotor. Day-date display configurations vary by model: together at 3 o'clock, date at 6 and day at 12, or together at 9 on X-Wind models. Found in Hamilton Pan Europ Auto, Khaki Aviation Pilot Day Date Auto, and Khaki Field Day Date watches.