Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1174 
GIC
C and a dot
circular 
7 mm 
 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 758 Show 758 3 1
RPC I, 758 Show 758 5 1
RPC I, 761 Show 761 4 1
RPC I, 758 Show 758 6 1