
The A. Lange & Söhne Datograph Perpetual (ref. 410.038) is a manual chronograph watch, with a 41mm 18kt white gold case, 13.5mm thick, powered by the L952.1 movement and a 36-hour power reserve. Water resistance is rated to 30m, under a sapphire crystal, with perpetual calendar, chronograph, moonphase, big date complications.