Rolex Datejust 31 ref 27839 (also known as ref 278289 or RBR). White gold case, white gold president bracelet with fixed diamond-set bezel and diamond-set dial. Features analog date display at the 3 o'clock position, silver-tone hands, powered by automatic Rolex Calibre 2236 movement containing 31 jewels beating at 28800 vph with approx 55 hours power reserve. Equipped with sapphire crystal, screw-down crown, solid case back and round 31mm size, features include date function, hour/minute/second display, chronometer rating, water resistance to 100m.
