Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1414 
GIC 99 .1
male bust r.
circular 
5 mm 
GIC gave coin as being from Stectorium. Coin reassigned to Pergamum; therefore GIC 99.1 id GIC 70 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC IV, 2172 (temporary) Show 3895 1 4.2