Swiss made, automatic, 27 mm/4.82 mm, 28,800 vph (4Hz), 304 total components, 50 jewels, 45-hour power reserve. Central rotor in 21K gold with unidirectional winding. Gyromax free sprung balance, Spiromax balance spring. Geneva stripes, and beveled and polished edges on bridges. Perlage on mainplate. Hours, minutes, central seconds, date, day of week, month, and weekly calendar functions.

Powers: Patek Philippe Ref. 5212A