Housed in a 40 mm 18 kt yellow gold Oyster case, reference 228398TBR-0040 features a monobloc middle case, screw-down case back, and a screw-down Twinlock winding crown delivering waterproofness to 100 metres / 330 feet. The bezel is set with diamonds, while a scratch-resistant sapphire crystal with a Cyclops lens over the date ensures clear legibility at every angle.
The silver dial showcases a Chromalight display with long-lasting blue luminescence, keeping the layout highly legible in low-light conditions. Day and date indications appear in dedicated apertures with instantaneous, secure rapid-setting, complemented by a stop-seconds function for precise time adjustment.
Power comes from Rolex Calibre 3255, a perpetual mechanical self-winding movement with bidirectional winding via a Perpetual rotor, a paramagnetic blue Parachrom hairspring, Paraflex shock absorbers, approximately 70 hours of power reserve, and a precision rating of -2/+2 seconds per day after casing — certified as a Superlative Chronometer to both COSC and Rolex standards. The 18 kt yellow gold President bracelet with semi-circular three-piece links closes via a concealed folding Crownclasp.
