Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1312 
GIC
bare male head r.
circular or shaped 
8 mm 
on obverse 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 1801 Show 1801 9 1
RPC I, 1801 Show 1801 4 1
RPC I, 1801 Show 1801 10 1
RPC I, 1801 Show 1801 11 1
RPC I, 1801 Show 1801 12 1
RPC I, 1801 Show 1801 13 1
RPC I, 1801 Show 1801 14 1
RPC I, 3515 Show 3515 14 1