ROLEX GMT MASTER OYSTER PERPETUAL MAN'S WRISTWATCH: CASE #1843832 MODEL #D137144 Rolex Oyster Perpetual, ''GMT Master'', Superlative Chronometer, 26 jewel movement model 1570 dated to 1966, two-time zone, center-seconds, self-winding, Water-resistant, stainless steel gentleman's wristwatch with date, special 24 hour bezel and hand. Black dial is featuring tritium-coated round indexes with foxing. Original tritium-coated steel hands. Movement Cal. 1570 .Diam. 40 mm. Replacement stem that will not screw down, running but needs service according to our retired horologist.