An art deco onyx and diamond wristwatch, by Cartier, circa 1917

The tonneau shaped dial, with Roman numerals, within a double row rose-cut diamond border with a single line of calibré-cut onyx between, to a jewelled lever movement with wolf's tooth winding, the articulated rose-cut diamond openwork shoulders of geometric design to a moiré silk strap with deployant clasp and rose-cut diamond buckle, the dial signed Cartier, the case numbered, French assay marks, interior diameter 5.5cm., fitted Cartier case. Sold for £23,000 plus Premium and tax

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