Vaucher Manufacture Fleurier VMF 4200/H,M,D

VMF 4200/H,M,D is an automatic movement manufactured by Vaucher Manufacture Fleurier. It measures 25.6 mm in diameter and 3.7 mm thick, operating at 28,800 vph. The movement features a twin barrel and variable-inertia balance wheel for improved timekeeping stability, plus a bidirectional rotor. It is available in two variants: one with hours, minutes, and central seconds (VMF 4200/H,M,SC) and one displaying hours and minutes only (VMF 4200/H,M).