Rolex Oyster Perpetual Submariner Date 41mm | 126618LN-000218k yellow gold case. Unidirectional rotating bezel with a black cerachrom top ring bezel and minute markers coated in yellow gold around the outer rim. Black dial with large luminescent hands and dot hour markers. Scratch resistant sapphire crystal with cyclops lens over the date. Screw down crown and a solid case back. Rolex calibre 3235 automatic movement with a 70 hour power reserve. Functions : Centre hour, minute and seconds hands, instantaneous