Rolex. A Stainless Steel Automatic Dual Time Wristwatch with Date, Center Seconds, and BraceletSigned Rolex, Oyster Perpetual, Retailed by Tiffany & Co., GMT-Master, Ref. 16750, Case No. 7'478'632, Circa 1982Cal. 3075 automatic jewelled movement, black matte dial, luminous dot, baton, and dagger numerals, luminous mercedes hands, center seconds central hand for second time zone, magnified date aperture, tonneau-shaped water-resistant-type case, revolving blue and red bezel calibrated for 24 hours, screw down crown, screw back, stainless steel Rolex Oyster bracelet and deployant clasp, case, dial, and movement signed39.5mm diam.