42-01

Hand-wound mechanical movement measuring 26x20.5 mm with a height of 4.3 mm. It runs at 28,800 vph with a 40-hour power reserve (+/- 5%), utilizing a screw balance with 18 gold weights, a flat balance spring, and Incabloc shock protection. Details include a stop-seconds function, chamfered edges, polished steel parts, blued screws, screwed gold chatons, Glashütte striped gear platforms, solar-finished crown wheels, and a swan-neck regulator.