Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1428 
Martini, Pangerl 104
IOY (Latin) or ΙΟΥ (Greek)
rectangular 
10 x 5 mm 
Uncertain mint in Commagene (Commagene)
applied in Syria to Tiberian dupondii 
List of countermarks View on a map

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 3868 Show 3868 17 1