Countermark

https://rpc.ashmus.ox.ac.uk/countermark/149 
GIC 29
ΔΙΟ before male bust (emperor?) r.
oval 
7 x 6 mm 
 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC VI, 5657 (temporary) Show 5123 1 6
RPC VI, 5647 (temporary) Show 5122 1 6