Countermark

https://rpc.ashmus.ox.ac.uk/countermark/594 
GIC 466
star and crescent
circular 
5 mm 
Sometimes on reverse 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC IV, 2979 (temporary) Show 3841 1 4.2
RPC IV, 2191 (temporary) Show 2995 1 4.2
RPC IV, 2143 (temporary) Show 3828 1 4.2
RPC IV, 2492 (temporary) Show 3829 2 4.2
RPC IV, 9986 (temporary) Show 3836 2 4.2
RPC IV, 2150 (temporary) Show 3840 2 4.2