Patek Philippe. An 18K gold openface keyless lever dress watch Signed Patek Philippe, Genève, ref. 600, movement no. 892'282, case no. 695'052, manufactured in 1956 Movement: cal. 17-140, manual, 18 jewels, stamped twice with the Geneva seal, signed Dial: signed Case: snap on back, 43.5 mm. diam., signed With: Patek Philippe Extract from the Archives confirming production of the present watch with laped gold indexes in 1956 and its subsequent sale on 16 April 1957