Rolex Yacht‑Master — Key Specs (Black Dial / 40–41 mm) Feature Specification Model Name Rolex Oyster Perpetual Yacht‑Master Case Size 40 mm (typical modern size) Case Material Oystersteel & Platinum (“Rolesium”) or Precious Metal Bezel Bidirectional rotatable 60‑minute graduated bezel with platinum or Cerachrom insert (varies by version) Dial Color Black / Dark Dial with Chromalight luminous hour markers Crystal Scratch‑resistant sapphire with Cyclops lens over date Movement Rolex Calibre 3235 automatic, self‑winding (date function) Power Reserve Approx. 70 hours Functions Hours, minutes, seconds, instantaneous date Bracelet Oyster bracelet (Oystersteel or Rolesium) with solid links Clasp Oysterlock folding safety clasp with Easylink 5 mm comfort extension Water Resistance 100 m / 330 ft Certification Rolex Superlative Chronometer (‑2/ 2 sec/day) Style Category Nautical luxury / sport watch
