40005059, Marlborough, 461.27, Portrait (profile left): Septimius Severus, Unknown, Boardman, J., Scarisbrick, D., Wagner C., Zwierlein-Diehl, E: The Marlborough Gems (2009), Story-Maskelyne, M.H.: The Marlborough Gems (1870), no. 461, Jasper, Green

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