Countermark

https://rpc.ashmus.ox.ac.uk/countermark/903 
GIC 774 i
denominational mark Γ
 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC IV, 1605 (temporary) Show 2406 16 4.2
RPC VIII, — (number not assigned), type ID 20327 Show 1037 10 8