Countermark

https://rpc.ashmus.ox.ac.uk/countermark/391 
GIC 268
Telesphorus
oval 
8 x 4 mm 
On obverse; probably applied at Pergamum 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC V.2, — (number not assigned), type ID 27588 Show 2298 2 5.2