Countermark

https://rpc.ashmus.ox.ac.uk/countermark/784 
GIC 658 i
monogram P VAR
Rectangular punch 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 4394 Show 4394 3 1
RPC I, 4400 Show 4400 2 1
RPC I, 4451 Show 4451 5 1
RPC I, 4451 Show 4451 4 1