40002499, Poniatowski, 1839-2091, Portrait (profile left): MARTIAL [MARCUS VALERIUS], MARTIALIS, Unknown, Pirzio Biroli Stefanelli, L.: La collezione Paoletti. Stampi in vetro per impronte di intagli e cammei vol.I (2007), Christie's, London, Catalogue des pierres gravées antiques de S.A. le Prince Stanislas Poniatowski ([1830?]-1833), II.298 ? probably not, Sardonyx

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