Countermark

https://rpc.ashmus.ox.ac.uk/countermark/746 
GIC 623
ΝΕ
rectangular 
4.5 x 3.8 mm 
Uncertain (Uncertain)
The other example on a late Hellenistic coin from Elis, has been split to a separate group 623.1 as GIC 623 is on an coin dating to times of Domitian from Thessalonica 
List of countermarks View on a map

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 1555 Show 1555 65 1