Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1549 
GIC
L or inverted Γ (incuse)
incuse 
c. 5 mm long x 3.5 mm wide 
 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 1434 Show 1434 20 1
RPC I, 1436 Show 1436 6 1
RPC I, 1600 Show 1600 12 1