Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1255 
GIC
BI-LI RVF and rudder
see CIL 3, 6790: an inscription in the memory of D. and M. Billienus Rufus erected by their father, found in Lycaonia. 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 4083 Show 4083 27 1
RPC I, 4083 Show 4083 29 1