Countermark

https://rpc.ashmus.ox.ac.uk/countermark/200 
GIC 79
laureate bust r.
circular 
No letter before, contra GIC 79 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC VIII, — (number not assigned), type ID 20553 Show 1441 2 8
RPC IV, 10905 (temporary) Show 3200 4 4.2
RPC IV, 10905 (temporary) Show 3200 5 4.2