Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1560 
GIC —
CA (on African coin)
rectangular 
6 x 2.5 mm 
Sabratha (Africa)
CAesar? or Caesar Augustus? Likely different from GIC 706 and Pangerl 84 as from Africa and different size punch 
List of countermarks View on a map

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 819 Show 819 6 1