around circumference: PAR . VBIQ . POTESTAS
Purchased c. 1978 by E.R.A. Unger, Richmond, England; (sale, Glendining's, London, 10 June 1987, no. 320); purchased through (Cyril Humphris, Ltd., London) by NGA.
- Pollard, John Graham. Renaissance Medals. The Collections of the National Gallery of Art Systematic Catalogue. 2 vols. Washington, 2007: 1:no. 494, repro.