Countermark

https://rpc.ashmus.ox.ac.uk/countermark/576 
GIC 454 ii
star of eight rays
oval 
7 x 4 mm 
applied to S C series coins (of Claudius in GIC). 454ii is not illustrated in GIC, but the example on the S C series coin of Tiberius has been allocated here. The other cmk was applied at Commagene. 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 4272 Show 4272 26 1
RPC I, 4277 Show 4277 25 1
RPC I, 4279 Show 4279 19 1