Countermark

https://rpc.ashmus.ox.ac.uk/countermark/182 
GIC 60
[ ] ΟΛ; emperor head r., with legend
circular (or slightly oval) 
In GIC as 'emperor, bust r., ? Legend around' 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC III, 401 Show 401 3 3
RPC III, 401 Show 401 2 3
RPC III, 401 Show 401 1 3