Diabolo

Round Cartier watch with a rounded case band, straight (often screwed) lugs and a domed sapphire crystalSapphire crystalA watch glass made from transparent synthetic sapphire, valued for its resistance to scratching., catalogued from the 1980s. Mid-size mechanical models use the Cartier-signed 9P2 with Breguet hands and guillochéGuillochéDecorative patterns engraved into a surface with an engine-turning machine. Similar-looking patterns do not by themselves establish how a dial was made. dials; quartz lady’s, Mini and Chronoreflex versions followed, and in the 1990s a tourbillonTourbillonA rotating cage carrying the escapement and balance, devised to average positional rate errors caused by gravity in upright pocket watches. and minute repeatersMinute repeaterA mechanism that sounds the time on demand, chiming the hours, completed quarter-hours and minutes elapsed since the last quarter. In a conventional two-gong arrangement, hours sound low, quarters use paired high-low tones and remaining minutes sound high. The action is requested by the wearer rather than triggered automatically at each quarter-hour., some as limited “Diabolo Louis Cartier” editions.