40004541, Marlborough, 466, Bust of Zeus with dress at the neck. A bevelled border cut in the upper layer., Walters Art Museum, Baltimore, Boardman, J., Scarisbrick, D., Wagner C., Zwierlein-Diehl, E: The Marlborough Gems (2009), Story-Maskelyne, M.H.: The Marlborough Gems (1870), 42.1197, Cameo, Sardonyx

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