Small 18k white gold with factory diamond‑set bezel; mother‑of‑pearl dial on many executions; quartz movement; satin strap. Diabolo de Cartier: rounded case with sculptural, ball‑tipped lugs; silvered or mother‑of‑pearl Roman dial; blued hands; sapphire cabochon crown; sapphire crystal; approx. 30 m water resistance; bracelet or leather/satin strap.