Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1327 
GIC —
ΤΡΑΙΑΝΟΥ
rectangular 
14.5 x 4 mm 
Ephesus (Ionia)
on reverse; might not have been applied at Ephesus? 
List of countermarks View on a map

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC III, 2045 Show 2045 3 3