Countermark

https://rpc.ashmus.ox.ac.uk/countermark/538 
GIC 416
grapes
On reverse 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 3118 Show 3118 1 1
RPC I, 3118 Show 3118 2 1
RPC I, 3118 Show 3118 7 1
RPC I, 3118 Show 3118 8 1