The Explorer’s Oyster case, guaranteed waterproof to a depth of 100 metres (330 feet), is a paragon of robustness. Its 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 that allows only Rolex watchmakers to access the movement. Fitted with the Twinlock double waterproofness system, the winding crown screws down securely against the case. The crystal is made of virtually scratchproof sapphire and the waterproof Oyster case provides optimum protection for the Explorer’s high-precision movement.
The Explorer is equipped with calibre 3132, a self-winding mechanical movement entirely developed and manufactured by Rolex. Its architecture, manufacturing quality and innovative features make it singularly precise and reliable. The oscillator, the true heart of the watch, has a blue Parachrom hairspring patented and manufactured by Rolex in an exclusive alloy. Insensitive to magnetic fields, the Parachrom hairspring offers great stability in the face of temperature variations and remains up to 10 times more precise than a traditional hairspring in case of shocks.
It is equipped with a Rolex overcoil, ensuring its regularity in any position. The oscillator is held firmly in place by a height-adjustable traversing bridge and is fitted between high-performance Paraflex shock absorbers, developed and patented by Rolex, that provide 50 per cent greater resistance to shocks. Calibre 3132 is equipped with a self-winding module via a Perpetual rotor and offers a power reserve of approximately 48 hours.
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