An Art Deco Enamel and Diamond Piano Powder Compact, circa 1930. Photo courtesy of Dupuis

Designed as a grand piano with highly polished black enamel case, applied with diamond-set monogramme 'EB'; black and white enamel keyboard with integrated thumbpiece, hinged cover opens to reveal a bevelled mirror and powder compartment, mounted in 14k gold, with fitted brown suede pouch stamped Black Starr & Frost-Gorham Inc., New York. Estimate:  1,500–2,250 EUR

PROVENANCE: From the estate of Canadian born, international pianist Ellen Ballon (1898-1969) who debuted in New York with the New York Symphony at the age of 12

Dupuis Fine Jewellery Auctioneers. Jewels Spring Sale. Toronto – june 23rd, 2013