Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1187 
GIC
Artemis standing, r., drawing arrow from quiver at shoulder, holding bow
oval 
5.5 x 3.5 mm 
the punch on the 10.38g coin is larger at 9.5 x 5.5 mm 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC VI, 6997 (temporary) Show 6722 2 6
RPC VI, 7000 (temporary) Show 6718 3 6
RPC VI, 6996 (temporary) Show 6721 4 6
RPC VI, 6996 (temporary) Show 6721 1 6