40000318, Poniatowski, T287, LEDA LOOKING WITH SURPRISE AT THE TWO EGGS DEPOSITED ON THE GROUND, FROM WHICH SPRUNG CASTOR AND POLLUX, GNAIOS, Gnaios, Daktyliothek Poniatowski 1832, Antikensammlung Berlin, Catalogue des pierres gravées antiques de S.A. le Prince Stanislas Poniatowski ([1830?]-1833), 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), Christie's, London, 85, Amethyst

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