Countermark

https://rpc.ashmus.ox.ac.uk/countermark/780 
GIC 655
monogram PV?
PV? 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 1504 Show 1504 3 1
RPC I, 1504 Show 1504 2 1
RPC I, 1504 Show 1504 5 1