Rolex Oyster Perpetual Sea-Dweller 126600. 43mm brushed and polished steel case, which is water resistant to 1,220 meters 4,000 feet. Automatic chronometer movement calibre 3235 entirely developed and manufactured by Rolex. Featuring a black dial with index hour markers. ‘SEA-DWELLER’ in red writing. 60-minute graduated, unidirectional rotatable ceramic bezel. Steel Oyster bracelet with double extension system allows adjustments to be made without the use of tools, so that the watch can be worn comfortably over a diving suit.