Champlevé

Champlevé is an enameling technique in the decorative arts, or an object made by that process, in which troughs or cells are carved, etched, die struck, or cast into the surface of a metal object, and filled with vitreous enamel. The piece is then fired until the enamel fuses, and when cooled the surface of the object is polished. Reference: Wikipedia

The technique has been used for centuries but it was extremely popular during the Art Deco era and lent itself well to the bold geometric patterns which were fashionable at the time.

Below are some examples and price guides of Art Deco champlevé items including French gold and enamel timepiece by Cartier and a Swiss watch pendant.