Blue enamel lady’s watch, designed to hang from a silk... ribbon or from a chain, Joseph Chaumet, circa 1910. Collection Chaumet Paris.

Diamond and coloured stones bowknot brooch with tartan... pattern, and its original drawing, Joseph Chaumet, 1907. S.J. Phillips, London.

Articulated diamond bowknot brooch, Joseph Chaumet, circa... 1910. Private Collection.

One of a pair of wings forming an aigrette, can be worn as a... brooch, Joseph Chaumet, circa 1900. Collection Chaumet Paris.