Physical Dimensions: diameter: 12.9 cm (5 1/16 in.)
mount: 19.2 x 19.2 cm (7 9/16 x 7 9/16 in.)
Provenance: (P. & D. Colnaghi & Co. Ltd., London, by 1961). Joseph F. McCrindle [1923-2008], New York; Joseph F. McCrindle Foundation, 2008; gift to NGA, 2009.