Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1239 
GIC
head, r.
circular 
7 mm 
applied at a mint in Caria to coins over 30 mm 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC V.2, — (number not assigned), type ID 73879 Show 4777 4 5.2
RPC V.2, — (number not assigned), type ID 73658 Show 4826 24 5.2
RPC V.2, — (number not assigned), type ID 85741 Show 4498 1 5.2
RPC V.2, — (number not assigned), type ID 65172 Show 4604 1 5.2
RPC V.2, — (number not assigned), type ID 85741 Show 4498 2 5.2