Physical Dimensions: overall (oval): 5.4 x 4.35 cm (2 1/8 x 1 11/16 in.)
Provenance: (sale, Sotheby's, London, 24 October 1979, no. 354). Dr. Charles Avery, London; (sale, Morton & Eden Ltd., London, 11-12 June 2008, no. 575); (sale, Morton & Eden Ltd., London, 11 December 2008, no. 286); Andrew M. Brown, Anchorage; gift 2009 to NGA.