40002537, Poniatowski, 1839-2129, A HELMET WITH BELLEROPHON AND THE CHIMERA, Unknown, Westropp, H.M.: A Manual of Precious Stones and Antique Gems (1874), Unknown, Burnham, S.M.: Precious Stones in Nature, Art and Literature (1886), Daktyliothek Poniatowski 1832, Antikensammlung Berlin, Christie's, London, Catalogue des pierres gravées antiques de S.A. le Prince Stanislas Poniatowski ([1830?]-1833), p. 104, Red jasper

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