Polished stainless steel case. Polished 18kt yellow gold Twinlock crown. Polished 18kt yellow gold domed bezel. Champagne dial. 10 diamond hour markers with the Rolex Crown logo at the 12 o'clock position. Polished yellow gold hands. Fine printed minutes/seconds track on the dial perimeter. Date window displayed at the 3 o'clock position with a cyclops magnifying lens. Rolex in-house caliber 3235, beats at 28,800 vph, contains 31 jewels & has an approximate power reserve of 70 hours. The movement features a Paramagnetic blue Parachrom hairspring, Chronergy escapement & high-performance Paraflex shock absorbers. The watch is Superlative Chronometer certified: the movement is COSC certified prior to casing, then it is tested a second time by Rolex after being cased to ensure accuracy. AKA: m126203-0018