around circumference: HERCVLES ESTENSIS II FERR[ariae] DVX IIII; around right circumference: POMPEIVS
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.
- Hill, George Francis, and Graham Pollard. Renaissance Medals from the Samuel H. Kress Collection at the National Gallery of Art. London, 1967: no. 446.
- Wilson, Carolyn C. Renaissance Small Bronze Sculpture and Associated Decorative Arts at the National Gallery of Art. Washington, 1983: 134, no. 23.
- Avery, Charles. "Fontainebleau, Milan, or Rome? A Mannerist Bronze Lockplate and Hasp." Studies in the History of Art 22 (1989):301-302, repro.
- Pollard, John Graham. Renaissance Medals. The Collections of the National Gallery of Art Systematic Catalogue. 2 vols. Washington, 2007: 1:no. 514, repro.