Countermark

https://rpc.ashmus.ox.ac.uk/countermark/751 
GIC 628
monogram ΠΑΡ (ΘΕΝΟΣ)
square or circular? 
6 x 6 mm 
Chersonesus (Bosporus)
Sometimes on reverse 
List of countermarks View on a map

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
Show 79
RPC I, 1941 Show 1941 1 1