The Henzi Pfaff 451 watch movement, which was produced from 1983 to 1988, features a free Breguet hairspring, a balance with regulating screws, and Kif shock protections for the balance and escapement wheel. Notably, the train and hand gear are uniquely driven separately by the barrel. In terms of functions, this movement is equipped with automatic winding, a sweep second hand, 12-hour and 24-hour display with center hands, a quickset date feature, and a hack feature.