Tonneau 2435

1990s Cartier Paris Tonneau, about 46 × 26 mm, with screwed “officier” lugs, sapphire-cabochonCabochonA stone polished into a smooth dome without facets. In watches, cabochons can decorate the crown or dial; the term describes the cut rather than a particular gemstone. crown, domed sapphire crystalSapphire crystalA watch glass made from transparent synthetic sapphire, valued for its resistance to scratching. and a silver guillochéGuillochéDecorative patterns engraved into a surface with an engine-turning machine. Similar-looking patterns do not by themselves establish how a dial was made. dial with black Roman numerals. First in individually numbered yellow gold, then in platinum as part of the Collection Privée.