The fluted case back is hermetically screwed down with a special tool exclusive to Rolex watchmakers. The crystal, with a rolex oyster perpetual day date sertie 2013 replica watch lens at 3 o’clock for easy reading of the date, is made of virtually scratchproof sapphire. The winding crown, fitted with the patented TWINLOCK double waterproofness system, screws down securely against the case.The 36 mm OYSTER case of the DAY-DATE “SERTIE”, guaranteed waterproof to a depth of 100 metres (330 feet), is a paragon of robustness, proportion and elegance. The characteristically shaped middle case is crafted from a solid block of 18 ct gold.
The oscillator, the true heart of the watch, has a blue rolex oyster perpetual day date replica hairspring patented and manufactured by Rolex in an exclusive alloy. Its design and quality manufacture provide peerless precision and reliability. Like all Rolex PERPETUAL movements, the 3155 is a certified Swiss chronometer, a designation reserved for high-precision watches that have successfully passed the Swiss Official Chronometer Testing Institute (COSC) tests. 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 DAY-DATE “SERTIE” models are equipped with calibre 3155, a self-winding mechanical movement with a day and date display entirely developed and manufactured by Rolex.
Using exclusive techniques and a subtle juxtaposition of materials, two new creations emphasize the natural beauty of mother-of-pearl. These two creations with diamond-set hour markers and bezels are offered on the DAY-DATE in 18 ct EVEROSE or white gold. Inspired by the famous English fabric, the oxford dial presents a basket-weave motif engraved on either white mother-of-pearl or on an enigmatic mother-of-pearl with platinum reflections obtained via a special process developed by rolex replica watch. The mother-of-pearl carousel dial features an openwork design hour ring in 18 ct white gold set with 217 diamonds and delicately inlaid with pink or white mother-of-pearl, engraved with a floral motif.