Countermark

https://rpc.ashmus.ox.ac.uk/countermark/70 
GIC 664
Α in circular punch
applied to 3rd C coins of Mallus 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC IX, 1437 Show 1437 18 9
RPC IX, 1435 Show 1435 20 9
RPC IX, 1434 Show 1434 4 9
RPC IX, 1436 Show 1436 3 9
RPC IX, 1435 Show 1435 4 9
RPC VIII, — (number not assigned), type ID 2193 Show 2285 2 8
RPC VIII, — (number not assigned), type ID 2201 Show 2284 11 8
RPC VIII, — (number not assigned), type ID 2201 Show 2284 7 8