Countermark

https://rpc.ashmus.ox.ac.uk/countermark/233 
GIC 110
laureate head r.
circular 
Noted on coins of Ancyra (Galatia), Pessinus and Nicomedia. Possibly connected with Caracalla's journey to the east in 215. 
List of countermarks View on a map

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber