Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1257 
GIC
Athena advancing l., with spear and shield
rectangular 
7 x 4 mm 
 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 1647 Show 1647 25 1
RPC I, 1647 Show 1647 29 1