40005186, Marlborough, 692, A warrior with helmet, spear and shield looks round to a mounted helmetless warrior with a spear, on horseback. 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. 692, Cornelian, 1st/2nd cent. AD?

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