Countermark

https://rpc.ashmus.ox.ac.uk/countermark/931 
GIC 816 i
denominational mark Ϛ
circular 
 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC VIII, — (number not assigned), type ID 20250 Show 1341 11 8
RPC X, — (number not assigned), type ID 61665 Show 2096 1 10
RPC X, — (number not assigned), type ID 61650 Show 2054 2 10
RPC X, — (number not assigned), type ID 90043 Show 2088 1 10