Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1505 
GIC
star of eight rays
circular 
6.5 mm 
on obverse. larger punch (6.5 mm) than GIC 459 (4 mm) 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC VI, 8600 (temporary) Show 8526 2 6