At 36 mm, the round Oystersteel and yellow gold case of this Datejust 36 is fitted with a scratch-resistant sapphire crystal and a Cyclops lens over the date, while a screw-down Twinlock winding crown delivers waterproofness to 100 metres / 330 feet. The solid case back and domed yellow gold bezel complete the Yellow Rolesor composition that defines reference 126203-0030.
The white dial features Roman numeral hour markers, and the Oyster bracelet — constructed from three-piece solid links in Yellow Rolesor — fastens with a folding Oysterclasp equipped with an Easylink 5 mm comfort extension link for an adaptable fit.
Power comes from the Calibre 3235, a perpetual, mechanical, self-winding movement by Manufacture Rolex. It offers a precision of -2/+2 seconds per day after casing, roughly 70 hours of power reserve, bidirectional winding via a Perpetual rotor, and a paramagnetic blue Parachrom hairspring with Paraflex shock absorbers. The movement holds Superlative Chronometer certification, reflecting both COSC testing and Rolex's own post-casing verification.
