Rolex, GMT Master, Ref. 16750, No. 819xxxx, undated original warranty, circa 1984. A very handsome steel pilot's watch with day/night, 12-24h and second time zone readout. Interesting transitional model that retains the plexiglass but already features circled hour markers and quick date change. Blue and red graduated bezel, black "Swiss t<25" dial, luminous hands and hour markers, permanent center seconds and date at 3 o'clock. Screw-down caseback and crown, self-winding mechanical movement. Oyster bracelet with folding clasp. Accompanied by undated original papers (marked 1984). Our watch is in very good overall condition, both aesthetically and mechanically. Note the hands replaced during a service. Diameter 40 mm A fine stainless steel "pilot's" wristwatch, featuring day/night, 12-24h & second time zone reading. Interesting transitional model between plexi & sapphire with circled indexes & quick date change. Black "Swiss t<25" dial, luminous patinated hands & indexes, sweep center seconds, date at 3. Automatic winding movement. Revolving "pepsi" 24h bezel, steel Oyster band with deployant buckle. Accompanied by its original undated papers (marked 1984). Our watch is in very good overall condition, both aesthetic and mechanical. Note the needles replaced during a service.