Countermark

https://rpc.ashmus.ox.ac.uk/countermark/547 
GIC 425
pentagram
circular (or slightly oval) 
4 mm 
 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC II, 956B Show 956 10 2
RPC II, 956B Show 956 22 2
RPC II, 956B Show 956 23 2