- c. 1960-1985, Purchased by Lisa and Leonard Baskin, Leeds, MA
- 2003, Gift of Lisa Unger Baskin to the National Gallery of Art, Washington
- Museum's website, 15 August 2011
- 2007 Pollard
John Graham Pollard, Renaissance Medals. The Collections of the National Gallery of Art Systematic Catalogue, 2 vols, Washington, 2007, vol 2, n. 900. repr.