QuickSwitch interchangeability system allows for easy interchanging of the bracelet/strap without the need of tools. SmartLink resizing system: allows for the metal bracelet links to be easily removed or reinstalled by the user. Watch details: Brushed stainless steel case with polished beveled corners. Polished 18kt yellow gold bezel secured with 8 stainless steel screws. Polished stainless steel crown with faceted synthetic spinel cabochon. Opaline silver dial. Black printed Roman Numeral hour markers. Fine black printed minute/seconds track. Blued steel hands. Cartier in-house manufactured caliber 1847MC, beats at 28,800 vph, contains 23 jewels & has an approximate power reserve of 48 hours. AKA: