Housed in a 36mm Oyster case crafted from 18kt white gold, the Day-Date 128239-0045 features a fluted bezel, a solid case back, and a screw-down winding crown secured by a Twinlock double waterproofness system. Scratch-resistant sapphire crystal with a Cyclops lens over the date protects the dial, and the watch is waterproof to 100 metres / 330 feet.
The turquoise dial is set with diamonds throughout: hour markers in 18kt gold carry 32 diamonds, while the Roman VI and IX numerals in 18kt gold are each set with 24 diamonds. The 18kt white gold diamond-set President bracelet closes with a concealed folding Crownclasp, completing a cohesive all-white-gold and stone presentation.
Powering the watch is the Rolex Calibre 3255, a perpetual mechanical self-winding movement with COSC certification and a precision rating of -2/+2 seconds per day after casing. It offers approximately 70 hours of power reserve, bidirectional winding via a Perpetual rotor, a paramagnetic blue Parachrom hairspring, Paraflex shock absorbers, and instantaneous day and date display with secure rapid-setting and stop-seconds functionality.
