.cal 27-460M, automatic nickel lever movement stamped with the Geneva seal, 37 jewels, Gyromax balance, 18ct gold signed rotor, adjusted to heat, cold isochronism and 5 positions, champagne dial with applied baton indexes and hands, date aperture at 3 o'clock, subsidiary seconds at 6 o'clock, stepped bezel, snap-on case back, with an 18ct yellow gold integrated Patek Philippe bracelet and folding clasp, case, dial and movement signed, 35mm diameter, length approximately 180, Patek Philippe presentation case