Countermark

https://rpc.ashmus.ox.ac.uk/countermark/584 
GIC 460
star of six rays (on obverse)
circular 
5.5 - 6 mm 
host coin was unidentified in GIC 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 1740 Show 1740 5 1
RPC I, 1740 Show 1740 6 1
RPC I, 1740 Show 1740 7 1
RPC I, 1740 Show 1740 8 1
RPC I, 1740 Show 1740 10 1
RPC I, 1740 Show 1740 11 1
RPC I, 1740 Show 1740 14 1