Tank Obus — Cartier Paris · Early, Arabic Numerals

Identifying details

• Arabic numerals

  Arabic hour numerals in place of Cartier’s usual Roman numerals.

• 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

  Winding crown set with a 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., typically a blue sapphire.

• European Watch & Clock Co. movementMovementThe working mechanism inside a watch or clock.

  supplied or signed by the European Watch & Clock Co., the Cartier–Jaeger joint venture.