The Oyster Perpetual Explorer in Oystersteel features a distinctive black dial with characteristic 3, 6, and 9 numerals with a Chromalight display. Its highly legible hour markers, extremely resistant Oystersteel and waterproofness have made it a tool watch for exploration. 36mm Oystersteel case, screw-down back, screw-down crown with twinlock double waterproofness system, smooth bezel, scratch-resistant sapphire crystal. Rolex calibre 3230 automatic movement, approximately 70 hours of power reserve, Oyster bracelet with flat three-piece links, folding Oysterlock buckle with Easylink 5mm comfort extension link. Waterproof to 100 meters.