40001740, Poniatowski, 1839-724, HEAD OF EUMENES IN A HELMET [SECRETARY TO PHILLIP AND ALEXANDER], ULLOU, Hyllos, Unknown, The Wellington Gems (1977) [London, Market, S.J. Phillips], Christie's, London, Catalogue des pierres gravées antiques de S.A. le Prince Stanislas Poniatowski ([1830?]-1833), 407.2, Cornelian

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