Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1694 
GIC
two touching circles, repeated twice
rectangular 
8.5 x 7.5 mm 
 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 4309 Show 4309 11 1
RPC II, 2021 Show 2021 67 2