Countermark

https://rpc.ashmus.ox.ac.uk/countermark/932 
GIC 816 ii
denominational mark Ϛ
 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC VIII, — (number not assigned), type ID 20465 Show 1192 4 8
RPC VII.1, 471A Show 471 1 7.1