Patek Philippe Perpetual Calendar Chronograph 3970EJ

Patek Philippe, A FINE YELLOW GOLD PERPETUAL CALENDAR CHRONOGRAPH WRISTWATCH WITH MOON PHASES AND REGISTERSREF 3970EJ THIRD SERIES MVT 875763 CASE 2860557 MADE IN 1991 gold diameter 36 mm, thickness 12 mm , • cal. 27-70Q, manual winding nickel lever movement, 24 jewels • silvered dial, applied baton indexes, yellow gold feuille hands, apertures for day and month, 3 subsidiary dials for 30-minute register combined with leap year, date combined with moon phases, and constant seconds combined with 24-hours • 18k yellow gold case, concave bezel, round chronograph push down buttons, screw-down sapphire crystal case back • case, dial, and movement signed • 18k yellow gold Patek Philippe buckle