Rolex Yacht‑Master 42 mm — Key Specs Feature Specification Model Name Rolex Oyster Perpetual Yacht‑Master 42 Case Diameter 42 mm (Oyster case) Case Material 18 k White Gold (solid precious metal) Bezel Bidirectional rotatable 60‑minute graduated bezel with matt black Cerachrom ceramic insert and polished raised numerals Dial Color Typically Black (official Rolex editions) — white/other dial colors are not standard Crystal Scratch‑resistant sapphire with Cyclops magnifier over date Movement Rolex Calibre 3235 automatic, self‑winding Power Reserve Approx. 70 hours Functions Hours, minutes, seconds, date with rapid setting Bracelet/Strap Oysterflex (high‑performance elastomer) with flexible metal blades Clasp Oysterlock folding safety clasp with Rolex Glidelock extension system Water Resistance 100 m / 330 ft Certification Rolex Superlative Chronometer (‑2/ 2 sec/day) Luminescence Chromalight long‑lasting blue glow on hands and markers Style Category Luxury nautical sports watch
