Prendeville, J.: Explanatory catalogue of the proof-impressions of the antique gems possessed by the late Prince Poniatowski and now in the possession of John Tyrrell, Esq. (1841): 513
Monson, (Lord)
Christie's, London: June 9, 1851, lot 212
Private Collection: Tom Swope (New York)
Comments: See also Tom Swope's blog: http://tomswope.blogspot.co.uk/2012/05/lost-poniatowski-gem.html
Link to this record using the address https://www.beazley.ox.ac.uk/record/A8609B33-4BA7-4A5D-B4AC-26118857ACC3