Audemars Piguet. A fine and rare 18K gold openface keyless lever dress watch with two-tone rose dial Signed Audemars, Piguet & Co., retailed by Hausmann & Co., case no. 21'975, made in 1920 and converted by Audemars Piguet in 1937 from a jump hour watch Movement: cal. 17SFV#3, mechanical, signed Dial: signed by maker and retailer Case: hinged cuvette numbered 21975 with engraved inscription "Maya, 8 April 1939, XVIIe", 44 mm. diam. numbered With: Audemars Piguet Extract from the Archives confirming the production of the present watch on 18 September 1920 and converted by Audemars Piguet in 1937 from a jump hour watch