Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1021 
GIC 681 .1
Ο? (or circle)
circular 
6 mm 
 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 3349 Show 3349 11 1
RPC I, 3349 Show 3349 12 1