Oyster Perpetual

The Oyster Perpetual’s Oyster case, guaranteed waterproof to a depth of 100 metres (330 feet), is a paragon of robustness and reliability. The characteristically shaped middle case is crafted from a solid block of particularly corrosion-resistant 904L steel. The fluted case back is hermetically screwed down with a special tool exclusive to Rolex watchmakers. The winding crown, fitted with the patented Twinlock double waterproofness system, screws down securely against the case. The crystal is made of virtually scratchproof sapphire. The waterproof Oyster case provides optimal protection  for the Oyster Perpetual’s high precision movement.

The 36 mm Oyster Perpetual is equipped with calibre 3130, a self-winding mechanical movement entirely developed and manufactured by Rolex. Like all Rolex Perpetual movements, the 3130 is a certified Swiss chronometer, a designation reserved for high-precision watches that have successfully passed the Swiss Official Chronometer Testing Institute (COSC) tests. Its design and quality manufacture ensure peerless precision and reliability. The oscillator, the true heart of the watch, has  a blue Parachrom hairspring patented and manufactured by Rolex in an exclusive alloy of niobium and zirconium. Insensitive to magnetic fields, the Parachrom hairspring offers  great stability when exposed to temperature variations and remains up to 10 times more precise in case of shocks than a traditional hairspring.  

The Oyster Perpetual watches are paired with a solid-link Oyster bracelet in 904L steel which is very secure and comfortable to wear. The bracelet is equipped with a folding Oysterclasp designed by Rolex.