Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1471 
GIC
ΝΙ or ΙΝ in circle
circular 
11 mm 
applied on a coin of Miletopolis 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC V.2, — (number not assigned), type ID 1189 Show 2235 1 5.2