Built around a 44mm yellow gold Oyster case, the Deepsea 136668LB-0001 employs Rolex's Ringlock System case architecture — featuring a monobloc middle case, screw-down case back, and screw-down Triplock winding crown — to achieve waterproofness to 3,900 metres / 12,800 feet. A domed, 5.5mm-thick scratch-resistant sapphire crystal protects the blue dial, whose Chromalight display delivers long-lasting blue luminescence for legibility in low-light conditions. The unidirectional rotatable 60-minute graduated bezel carries a scratch-resistant Cerachrom insert in blue ceramic with numerals and graduations coated in gold.
The Oyster bracelet is constructed from three-piece solid links in 18kt yellow gold, secured by a folding Oysterlock safety clasp with the Rolex Glidelock extension system. Powering the watch is the Calibre 3235, a self-winding mechanical movement from Manufacture Rolex 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. The movement holds Superlative Chronometer certification, reflecting both COSC and Rolex's own post-casing standards.
Functions include centre hour, minute, and seconds hands, an instantaneous date with rapid setting, and stop-seconds for precise time setting. This example is presented as a complete set, accompanied by the original Rolex box and Rolex papers dated 2025.
