细节
Patek Philippe. A fine 18K gold openface perpetual calendar keyless lever watch with phases of the moon
Signed Patek Philippe, Genève, No. 931259, circa 1972
17-170, with nickel-finished lever movement, 18 jewels, bimetallic compensation balance, the silvered matt dial with applied baton numerals, gold dauphine hands, aperture for month, date and day, subsidiary dial indicating phases of the moon combined with constant seconds, in circular plain case with snap on back (No. 327505 Ref. 725/4), case, dial and movement signed
46 mm. diam.