Countermark

https://rpc.ashmus.ox.ac.uk/countermark/361 
GIC 238 i
Asclepius, Γ? below
oval 
9 x 5 mm 
on coins of Pergamum of Domitian and Domitia 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC II, 921 Show 921 2 2
RPC II, 921 Show 921 5 2
RPC III, 1712 Show 1712 2 3