PATEK PHILIPPE very fine and rare astronomical gents wristwatch with perpetual calendar reference 3940, 2nd. series, self winding, 18k yellow gold including original leather strap with original 18k yellow gold buckle, sapphire crystal, snap on case back, silvered dial with raised gold-hour-signs, dauphine hands, display of hours, minutes, day, date, month, leap year, moon phase & 24 hour-display, correction in case inserted, rhodium plated movement fine finished, fausses cotes decoration, seal of Geneva, calibre 240 Q, 27 jewels, solid 22k gold micro-rotor, Gyromax- balance, flat hairspring, Kif-shock-absorber, original box, setting pin, users manual & certificate, sold in October 1988, diameter approx. 36 mm, condition 1-2, discontinued reference since 2006, from a private collection