Belle Epoche Platinum Diamond Convertible Necklace

Pendant-Watch by Vacheron Constantin. Circa 1920. The reverse of the pendant set with a carved moonstone cameo depicting a dancing maiden in classical dress, signed Brandt, framed by 41 pearls measuring approximately 4.5 to 2.8 mm, the pendant-watch and surmount set with diamonds, mechanical movement, dial signed Vacheron & Constantin, Genève, caseback signed Verger, with French assay marks.