Countermark

https://rpc.ashmus.ox.ac.uk/countermark/57 
GIC 815
denominational mark Ϛ
circular 
5.5 mm 
applied to smaller coins of c. 19 to 22 mm diameter 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC IX, 761 Show 761 2 9
RPC X, — (number not assigned), type ID 61584 Show 2086 6 10
RPC X, — (number not assigned), type ID 61592 Show 2089 8 10
RPC VI, 10881 (temporary) Show 4385 2 6
RPC X, — (number not assigned), type ID 61697 Show 2147 3 10
RPC X, — (number not assigned), type ID 61696 Show 2151 16 10
RPC X, — (number not assigned), type ID 61696 Show 2151 35 10
RPC X, — (number not assigned), type ID 61696 Show 2151 34 10
RPC X, — (number not assigned), type ID 61592 Show 2089 9 10
RPC X, — (number not assigned), type ID 61592 Show 2089 10 10