Rolex Submariner 40 mm — Key Specs
| Feature | Specification |
|---|---|
| Model Name | Rolex Submariner 40 mm (standard divers’ model) |
| Case Size | Approximately 40 mm (classic size) |
| Case Material | Oystersteel (904L stainless steel) — also available in Rolesor (steel & gold) and solid gold variants |
| Bezel | Unidirectional rotatable bezel with Cerachrom ceramic insert and 60-minute graduations |
| Crystal | Sapphire crystal (scratch-resistant) — Cyclops lens on date models |
| Movement | Rolex Calibre 3130 (No-Date) or Calibre 3135 / 3235 (Date versions) — automatic, self-winding |
| Power Reserve | Approx. 48 hours (older calibres) or ~70 hours (newer 32xx series) |
| Functions | Hours, minutes, seconds (and date on Date models) |
| Bracelet | Oyster bracelet with Oysterlock safety clasp and Glidelock extension system |
| Water Resistance | 300 m / 1,000 ft (professional dive rating) |
| Certification | Rolex Superlative Chronometer (-2/+2 sec/day) |
| Luminescence | Chromalight long-lasting blue glow on hands and markers |
| Style Category | Professional dive watch |
