Countermark

https://rpc.ashmus.ox.ac.uk/countermark/909 
GIC 782
denominational mark Δ
incuse 
c. 5 x 5 x 5 mm 
Nicopolis ad Istrum (Moesia)
Sometimes on reverse 
List of countermarks View on a map

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC IV, 4338 (temporary) Show 2794 7 4.1
Show 452
RPC IV, 4337 (temporary) Show 2797 8 4.1