Hamilton 780

The Hamilton 780 is an open-face caliber mechanical movement with stem wind and set function, produced in Switzerland from 1930 onwards. It measures 30mm in diameter and 5.5mm in height, beats at 28800 vph, delivers 65 hours of power reserve, and contains 25 jewels. The movement features a sub-second display, power reserve indicator, sweep seconds, and Incabloc shock protection. It remains in production.