Art Deco testimony by Cartier. This wristwatch is totally complete and in authentic condition. Platinum, Yellow Gold 18k 750 (Black enameled), Diamond (Old mine cut and Rose-cut) and Onyx Wristwatch. Roman numerals. Three serial numbers on the platinum Tonneau case. Additional numbers on the yellow gold enameled clasp. Movement European Watch and Clock Inc. French marks. Circa 1925.