Its architecture, like that of all Rolex Oyster Perpetual Yacht-Master 40 Replica Watch movements, makes 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 when exposed to temperature variations and remains up to 10 times more precise than a traditional hairspring in case of shocks.
The winding crown, ﬁtted with the patented TRIPLOCK triple waterproofness system, screws down securely against the case. It is protected by a crown guard that is an integral part of the middle case. The crystal, with a CYCLOPS lens at 3 o’clock for easy reading of the date, is made of virtually scratchproof synthetic sapphire. The waterproof OYSTER case ensures optimal protection for the Rolex Oyster Perpetual Yacht-Master Replica high-precision movement.
The YACHT-MASTER’s 40 mm OYSTER case, guaranteed waterproof to a depth of 100 metres (330 feet), is a paragon of robustness. 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 YACHT-MASTER is equipped with calibre 3135, a self-winding mechanical movement entirely designed and manufactured by Rolex. Like all PERPETUAL movements, the 3135 is a certiﬁed Swiss chronometer, a designation reserved for high-precision watches that have successfully passed the Swiss Ofﬁcial Chronometer Testing Institute (COSC) tests.
The new Rolex Yacht-Master Replica is ﬁtted with a solid-link OYSTER bracelet in 904L steel with a new-generation OYSTERLOCK safety clasp, both simple to manipulate and including a security system to prevent accidental opening. Developed and patented by Rolex, this elegant solid-link bracelet offers remarkable comfort and ease of use. It also features the ingenious EASYLINK rapid extension system that allows the wearer to easily increase the bracelet length by approximately 5 mm, for additional comfort in any circumstance.