A XIXth silver gilt mounted agate cameo pendant of Minerva. The reverse engraved with a " C " and with an aluminium mark bearing the n

A XIXth silver gilt mounted agate cameo pendant of Minerva.
The reverse engraved with a " C " and with an aluminium mark bearing the number 3174 of the Collection of the Princes Napoléon.
The gold chain add later.
Cameo dimension : 1,73 x 1,18 in (44 x 30 mm)