Countermark

https://rpc.ashmus.ox.ac.uk/countermark/886 
GIC 752
denominational mark Β
rectangular 
Byzantium (Thrace)
probably applied at the same time as GIC 520i (ΒΥΖ Γ) 
List of countermarks View on a map

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
Show 21