Reference 128238-0119 houses the Day-Date 36's round, 36 mm case crafted entirely in 18K yellow gold, featuring a fluted bezel and a scratch-resistant sapphire crystal with a Cyclops lens magnifying the date. The Oyster architecture employs a monobloc middle case, screw-down case back, and a screw-down Twinlock double waterproofness winding crown, delivering water resistance to 100 metres / 330 feet.
The green ombré dial is appointed with Roman numerals and sits behind a solid case back. The wrist presence is completed by an 18K yellow gold diamond-set President bracelet secured by a concealed folding Crownclasp, making for a refined pairing with the warm gold case.
Power comes from the Calibre 3255 perpetual, mechanical, self-winding movement — a Superlative Chronometer certified to -2/+2 seconds per day after casing — with bidirectional winding via a Perpetual rotor, a paramagnetic blue Parachrom hairspring, high-performance Paraflex shock absorbers, and an approximately 70-hour power reserve. Functions include centre hour, minute, and seconds hands alongside instantaneous day and date displays with secure rapid-setting and stop-seconds for precise time setting.
