Rolex Datejust 31 M278383rbr Watch

Rolex Datejust 31 – M278383RBR

The Rolex Datejust 31 in reference M278383RBR is a masterclass in horological refinement — a mid-size timepiece that balances technical precision with enduring elegance. Presented on an Oyster bracelet with a fluted bezel set with diamonds, this reference exemplifies Rolex's commitment to both form and function.

Case & Bracelet

• Case diameter: 31 mm
• Case material: Oystersteel and 18 ct Everose gold
• Bezel: Fluted, 18 ct white gold set with 46 diamonds (~0.66 ct)
• Crystal: Scratch-resistant sapphire with Cyclops lens over date
• Water resistance: 100 metres / 330 feet
• Bracelet: Oyster, three-piece solid links
• Clasp: Oysterclasp with Easylink 5 mm comfort extension

Dial

• Dial colour: Pink (Rhodonite)
• Dial set with: Diamond hour markers
• Date display: Cyclops lens at 3 o'clock

Movement

• Calibre: 2236 (manufacture)
• Movement type: Perpetual, mechanical, self-winding
• Power reserve: Approximately 55 hours
• Oscillator: Syloxi silicon hairspring
• Chronometric precision: −2/+2 sec/day (Superlative Chronometer certified)
• COSC certified: Yes

Certification & Guarantee

Every Rolex Datejust 31 carries the Superlative Chronometer certification — independently tested to a precision of −2/+2 seconds per day after casing. Supplied with the Rolex Green Seal and a five-year guarantee.

Key Features

• Iconic Datejust design, continuously produced since 1945
• Diamond-set fluted bezel and diamond hour markers
• Syloxi silicon hairspring for enhanced resistance to magnetic fields and shocks
• Easylink extension system for on-the-fly bracelet adjustment
• Oystersteel and Everose gold two-tone construction