40004915, Marlborough, 455, Portrait (profile right): Julius Caesar. Head of Julius Caesar or commemorative of William III. A star in the field., Unknown, Boardman, J., Scarisbrick, D., Wagner C., Zwierlein-Diehl, E: The Marlborough Gems (2009), Story-Maskelyne, M.H.: The Marlborough Gems (1870), no. 455, Sapphire, hexagonal, 18th cent.

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