across bottom: OPVS SPERANDEI
Gustave Dreyfus [1837-1914], Paris; his heirs; purchased with the entire Dreyfus collection 9 July 1930 by (Duveen Brothers, Inc., London, New York, and Paris); sold 31 January 1944 to the Samuel H. Kress Foundation, New York; gift 1957 to NGA.
- The Gualenghi-d'Este Hours: Art and Devotion in Renaissance Ferrara, The J. Paul Getty Museum, Los Angeles, 2000, brochure and unnumbered catalogue.
- Hill, George Francis, and Graham Pollard. Renaissance Medals from the Samuel H. Kress Collection at the National Gallery of Art. London, 1967: no. 116.
- Pollard, John Graham. Renaissance Medals. The Collections of the National Gallery of Art Systematic Catalogue. 2 vols. Washington, 2007: 1:no. 85, repro.