Tonneau (39 mm, Cartier Paris)

Smaller 1990s Tonneau, 39 × 26 mm, with a 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 signed Paris, 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 and cal. 78-1.