Pre-Owned Rolex Datejust is one of Rolex’s undisputed icons. In its current version, its case measures a traditional 36mm. This model is equipped with calibre 3135, a self-winding mechanical movement entirely developed and manufactured by Rolex. Like all Rolex 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. It features a stainless steel screw-down crown with a twin lock double waterproofing system. It is fitted with a Parachrom hairspring, offering greater resistance to shocks and to temperature variations.