Countermark

https://rpc.ashmus.ox.ac.uk/countermark/753 
GIC 630
monogram ΠΡΟΥ (on reverse) (on blank coins)
square 
6 x 6 mm 
 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC II, 687 Show 687 7 2
RPC II, 687 Show 687 6 2
RPC II, 687 Show 687 9 2
Show 104
Show 148
Show 99