Rolex Datejust Oysterquartz MK1 Black Dial Circa 1979 (Serial 6010XXX), the 36mm case is excellent showing sharp beveling and only very light wear, the smooth bezel is also in excellent condition showing only very light wear form use, the original and rare MK1 black tritium dial is in excellent conditions, the lume has aged to a creamy hue and the hands match perfectly, the 12 link OysterQuartz bracelet is excellent showing only light stretch for its age and the clasp is stamped with a matching 1979 date code, no service history, perfect working conditions