Rolex Deepsea 44 mm

Rolex Deepsea 136660-0005 is a 44 mm dive watch in steel, built for extreme depth. The case measures 17.7 mm thick and holds a domed, scratch-resistant sapphire crystal. A black ceramic unidirectional bezel with a 60-minute scale sits on top, its numerals coated in platinum. The self-winding calibre 3235 drives the watch, offering a chronometer-certified 70-hour power reserve. Hands and indices carry luminous treatment for visibility in dark conditions, and a helium valve on the case allows saturation diving without damage on ascent. The D-blue dial pairs with a steel Oyster bracelet fitted with a folding Oysterlock clasp and Glidelock extension for adjustments over a wetsuit. Rolex rates the case to 3900 metres, among the deepest ratings the brand offers.