Patek Philippe. A very fine and rare 18K gold perpetual calendar chronograph wristwatch with moon phases, 24 hour and leap year indication Signed Patek Philippe, Genève, Ref. 3971E, movement no. 875’381, case no. 2'851'221, manufactured in 1989 Movement: CH 27-70 Q stamped with the Geneva seal, manual, 24 jewels, signed Dial: signed Case: snap on back, 36 mm. diam., signed With: 18K gold Patek Philippe buckle, Extract from the Archives confirming manufacture of the present watch in 1989 and its subsequent sale on 27 July 1989.