Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1381 
GIC 156 i
laureate (?) head r.
circular (or slightly oval) 
8.5 mm 
 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 4983 Show 4983 9 1
RPC I, 4983 Show 4983 16 1