Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1189 
GIC
TP (Latin) or ΤΡ (Greek) monogram
circular 
5.5 mm 
 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC VI, 6026 (temporary) Show 5679 2 6
RPC VI, 10836 (temporary) Show 5668 2 6