Countermark

https://rpc.ashmus.ox.ac.uk/countermark/264 
GIC 137
male bust r. in rectangular punch
rectangular 
5.5 x 3 mm 
 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC V.3, — (number not assigned), type ID 69959 Show 4298 3 5.3
Show 220