The Oyster case, symbol of waterproofness
A paragon of robustness and elegance, the Oyster case of the Oyster Perpetual 28, Oyster Perpetual 36 and Oyster Perpetual 41, respectively 28 mm, 36 mm and 41 mm in diameter, is guaranteed waterproof to a depth of 100 metres (330 feet). The middle case is crafted from a solid block of Oystersteel and crowned with a domed, polished bezel. The Twinlock winding crown, fitted with a double waterproofness system, screws down securely against the case. The crystal is made of virtually scratchproof sapphire and benefits from an anti-reflective coating. The waterproof Oyster case provides optimal protection for the movement it houses.