Rolex Yacht‑Master 40 mm Black Dial — Key Specs Feature Specification Model Name Rolex Yacht‑Master 40 Reference 126622 (Black Dial variant) Case Diameter 40 mm Case Material Rolesium (Oystersteel 950 Platinum bezel) Bezel Bidirectional rotatable 60‑minute platinum bezel with raised polished numerals Dial Color Black Crystal Scratch‑resistant sapphire with Cyclops over date Movement Rolex Calibre 3235 automatic, self‑winding Power Reserve ~70 hours Functions Hours, minutes, seconds, date Bracelet Oysterflex bracelet 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 Luxury nautical sports watch
