Rolex. A very fine and rare 18K gold openface single button chronograph watch with two-tone rose sector dial Signed Rolex, Genève, Ref. 3068, Case No. 1’008’593, Circa 1937 Movement: manual, 17 jewels, signed Dial: signed Case: inside case back stamped 3068 with brevet number 144’357, 48 mm diam., signed