Countermark

https://rpc.ashmus.ox.ac.uk/countermark/36 
GIC 812
denominational mark Ϛ
circular 
6 mm 
Bria (Phrygia)
possibly variant of GIC 811? 
List of countermarks View on a map

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC V.2, — (number not assigned), type ID 296 Show 5198 1 5.2