21-01

Manual mechanical movement measuring 17.5x13.8 mm and 3.7 mm in height. It operates at 28,800 vibrations per hour with a 38-hour (+/- 5%) power reserve, utilizing a flat balance spring, 17 jewels, and Incabloc shock protection. Features include refined finishing, anglage, hand-polished steel, blued screws, striped bridges, and solar-finished crown wheels.