Countermark

https://rpc.ashmus.ox.ac.uk/countermark/235 
GIC 111 ii
bare head r.; on reverse
shaped, angular 
7 x 6 mm 
possibly applied at Antioch (Syria). Head might represent Caligula, under whom no bronze coins were struck at Antioch. 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 3868 Show 3868 29 1