Rolex, GMT-Master Ref. 16713, Oyster Perpetual Date, Steel And 18k Gold, circa 1991 Case: 40 mm, stainless steel and 18k gold, screw down case back and crown, gold and black uni-directional bezel, No N364109 Dial: gloss black, luminous gold framed indexes, date aperture at three, luminous gold skeleton hands Movement: Rolex Cal. 3185, rhodium finish, oeil-de-perdrix decoration, 31 jewels, straight line lever escapement, monometallic balance adjusted to temperature and 5 positions, shock absorber, self-compensating free sprung Breguet balance spring, Microstella regulating screws, hack mechanism Band: Rolex 78363, stainless steel and 18k gold, 13 links, deployant clasp Signed: Rolex on the case, dial, movement and clasp HID03101062020 © 2020 Heritage Auctions | All Rights Reserved