Physical Dimensions: overall (diameter): 5.8 cm (2 5/16 in.)
gross weight: 54.45 gr (0.12 lb.)
Provenance: Oscar Hainauer [d. 1894], Berlin; his wife, Julie Hainauer, Berlin; acquired 1906 by (Duveen Brothers, Inc., London and New York); by exchange 21 October 1920 to Joseph E. Widener, Lynnewood Hall, Elkins Park, Pennsylvania; gift 1942 to NGA.