Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1410 
GIC
uncertain in circular punch
circular 
 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 2969 Show 2969 18 1
RPC II, 1802 Show 1802 10 2
RPC I, 4505 Show 4505 1 1