Countermark

https://rpc.ashmus.ox.ac.uk/countermark/590 
GIC 462 iv
star and date ΔΟϹ
rectangular 
9 x 6 mm 
AD 213. On reverse 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC V.3, — (number not assigned), type ID 68291 Show 5276 2 5.3