41-01

Hand-wound mechanical movement measuring 26.0 mm in diameter and 4.35 mm in height (excluding tourbillon cage). It operates at 21,600 vph with a 48-hour power reserve (+/- 5%), featuring a screw balance with 18 gold weights, a Breguet spring, and 16 jewels plus 2 diamonds. Functions include decentralized hours and minutes, a small seconds tourbillon, and a cantilevered minute tourbillon visible on the dial, complemented by hand-polished steel, screwed gold chatons, blued screws, and solar-finished crown wheels.