Rolex Daytona 6263 "Sigma" Circa 1973, excellent and sharp case that has just return from polishing, the rare MK1 bezel is also in excellent condition showing only light wear from use, the matte black dial is excellent showing only very light wear from use, he silver subdials are also excellent showing some light wear from use, most of the lume plots are missing some or all of their luminous mass and the remaining lume has aged to a warm creamy hue, the hands have aged to a sage hue, all lume glows brightly when exposed to UV and falls off rapidly at the same rate, the 12 link USA rivet bracelet is excellent showing light stretch for its age. the clasp is stamped with a 1-73, no service history, perfect working conditions