Rolex, "Oyster Perpetual Date, GMT-Master II, Superlative Chronometer, Officially Certified", Ref. 16718. Case No. E788943 Fine, center seconds, self-winding, water-resistant, two time zone, 18K yellow gold wristwatch with special black 24-hour gold bezel and hand, independently adjustable hour hand and quick date set, and 18K yellow gold riveted Rolex Oyster bracelet.Made circa 1990 Dial, case and movement signed, in very good condition NOTE: Reference 16718, is the rarer gold version of the reference 16710 GMT-Master II. Production of the reference 16710 began in 1989 and continued until 2007