ROLEX GMT MASTER II. REF. 16710 PRODUCED AROUND 1999 Steel wristwatch with dual time zone, series A. Case: screw-down crown and back, steel rotating bezel, black/red 'coke' aluminum insert, 24-hour scale, sapphire crystal. Dial: black, circled hour-markers and Superluminova hands, second time zone, central seconds and date window. Movement: automatic. Strap: steel Rolex Oyster, ref. 78790 / 501B, X10 (1999) folding clasp, 11 links. Dial, case and movement signed. Numbered A631398. Diameter: 40 mm.