Physical Dimensions: overall (irregular disk, largest diameter): 4.46 cm (1 3/4 in.)
overall (irregular disk, smallest diameter): 4.21 cm (1 11/16 in.)
gross weight: 22.08 gr (0.049 lb.)
Provenance: Gustave Dreyfus [1837-1914], Paris; his estate; purchased 1930 by (Duveen Brothers, Inc., London and New York); purchased 1945 by the Samuel H. Kress Foundation, New York; gift 1957 to NGA.