At the heart of this Day-Date is a 36mm Oyster case crafted in 18 kt yellow gold, featuring a monobloc middle case, screw-down case back, and a screw-down Twinlock winding crown for waterproofness to 100 metres. The bezel is set with diamonds, and the scratch-resistant sapphire crystal incorporates a Cyclops lens positioned over the date window.
The dial in white mother-of-pearl is itself set with diamonds in 18 kt gold settings, with baguette-cut diamonds marking the 6 and 9 o'clock positions. Powering the watch is the Calibre 3255, a perpetual mechanical self-winding movement from Manufacture Rolex, offering a precision of -2/+2 seconds per day after casing, a power reserve of approximately 70 hours, and a paramagnetic blue Parachrom hairspring paired with Paraflex shock absorbers. It carries Superlative Chronometer certification, reflecting both COSC and Rolex's own post-casing standards.
The 18 kt yellow gold President bracelet with its semi-circular three-piece links fastens via a concealed folding Crownclasp, completing reference 128398TBR-0004 as a thoroughly appointed expression of the Day-Date lineage.
