Countermark

https://rpc.ashmus.ox.ac.uk/countermark/125 
GIC 9
Helios, radiate bust r.
oval 
Helios had a temple at Philadelphia (SNG vA 3081 ). The countermarking is possibly to be connected with the Δεῖα Ἅλία held there under Caracalla (BMC p. 202, 87; CIG 3428) 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC VI, 30461 (temporary) Show 4561 7 6