Swiss. 1966. Serial # 1735XXX. Stainless steel Includes box, outer box, papers and original sales pamphlet. The included papers are named to the original purchaser, matched to the engraving on the caseback. Features matte 'frog's foot' dial with tritium hour markers. Original hands feature creamy luminous that has aged to match the hour markers. Correct '7206' stainless Oyster rivet link band. Inner caseback stamped, "Montres Rolex S.A - Geneva Switzerland Patented - Stainless Steel - 1016 - VI 66". Caseback engraved to previous owner as service award. Dial marked, "Rolex Oyster Perpetual Explorer - Superlative Chronometer Officially Certified - Swiss T < 25". Movement caliber 1520, serial 220XXX. Band stamped, "7206", clasp stamped, "3 69". 36mm case diameter. Unpolished case features sharp edges, especially notable at bezel. Rotor is slightly loose. CODE-WAT