Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1379 
GIC —
laureate head r., on reverse
rectangular (or square?) 
5–5.5 mm 
Pella (Syria)
no certainty cmk applied at Pella 
List of countermarks View on a map

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC II, 2098 Show 2098 4 2