Reference 128238-0082 houses the Day-Date 36 in an 18K yellow gold Oyster case measuring 36 mm, featuring a monobloc middle case, solid case back, and a screw-down winding crown with Twinlock double waterproofness. Scratch-resistant sapphire crystal with a Cyclops lens over the date tops the case, which is rated waterproof to 100 metres / 330 feet. The fluted gold bezel frames a white dial that displays the day and date through separate apertures with instantaneous, rapid-setting functionality.
The watch rides on an 18K yellow gold diamond-set President bracelet secured by a concealed folding Crownclasp. Inside, Rolex Calibre 3255 — a perpetual, mechanical, self-winding movement — delivers bidirectional winding via a Perpetual rotor, a power reserve of approximately 70 hours, and a precision rating of -2/+2 seconds per day after casing. The oscillator features a paramagnetic blue Parachrom hairspring and high-performance Paraflex shock absorbers.
Calibre 3255 carries Superlative Chronometer designation, reflecting both COSC certification and Rolex's own post-casing certification standard. Stop-seconds functionality allows for precise time setting, rounding out a movement specification that underpins the Day-Date's enduring reputation.
