Housed in a 36 mm round case built from Oystersteel and Everose gold, the Datejust 126231-0044 features a monobloc middle case, solid case back, and a screw-down winding crown equipped with Rolex's Twinlock double waterproofness system. Scratch-resistant sapphire crystal with a Cyclops lens over the date sits above the chocolate dial, while the fluted bezel adds a distinctive finishing touch. The case is waterproof to 100 metres / 330 feet.
The three-piece solid-link Oyster bracelet is rendered in Everose Rolesor — the same combination of Oystersteel and Everose gold as the case — and fastens via a folding Oysterclasp with an Easylink 5 mm comfort extension link. Inside, Calibre 3235 delivers bidirectional self-winding through a Perpetual rotor, a precision of -2/+2 seconds per day after casing, and functions including centre hour, minute, and seconds hands, an instantaneous date with rapid setting, and stop-seconds for precise time setting.
The movement's oscillator incorporates a paramagnetic blue Parachrom hairspring and high-performance Paraflex shock absorbers. Calibre 3235 holds both COSC certification and Rolex's own Superlative Chronometer certification applied after casing, underscoring the movement's measured accuracy.
