Countermark

https://rpc.ashmus.ox.ac.uk/countermark/564 
GIC 443
star with ten rays
circular 
5 mm 
Uncertain where this cmk was applied 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC VIII, — (number not assigned), type ID 20789 Show 1510 8 8
RPC IX, 789D Show 789 1 9
RPC VI, 10797 (temporary) Show 3956 1 6