Countermark

https://rpc.ashmus.ox.ac.uk/countermark/346 
GIC 222
female (?) head r. (Tranquillina?)
circular 
6 mm 
Cotiaeum (Phrygia)
If the head is not female cmk is probably the same as GIC 98 
List of countermarks View on a map

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC VI, 5763 (temporary) Show 5460 8 6