Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1403 
GIC
Capricorn r., star above back
similar to GIC 300, but unlikely to be the same with applications at Apamea (Bithynia) and Mysomakedones (Lydia) 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 2567 Show 2567 3 1
RPC I, 2567 Show 2567 4 1