40004619, Marlborough, 644, A warrior with helmet, shield and spear, sacrifices to Athena over a burning altar; she holds an owl on a wreath, a spear and shield, a rearing snake before her. Ground line., Unknown, Boardman, J., Scarisbrick, D., Wagner C., Zwierlein-Diehl, E: The Marlborough Gems (2009), Story-Maskelyne, M.H.: The Marlborough Gems (1870), no. 644, Nicolo

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