Countermark

https://rpc.ashmus.ox.ac.uk/countermark/335 
GIC 211
ƐΡΥ, helmeted head of Athena, r.
circular 
6.5 mm 
Erythrae (Ionia)
GIC gave description as "female head r." , with further examples, head can be seen as helmeted and like Athena 
List of countermarks View on a map

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC III, 1992 Show 1992 6 3
RPC III, 1991 Show 1991 2 3
RPC III, 1992 Show 1992 8 3
RPC III, 1992 Show 1992 2 3
RPC III, 1992 Show 1992 1 3
RPC III, 1992 Show 1992 9 3
RPC III, 1992 Show 1992 10 3