Countermark

https://rpc.ashmus.ox.ac.uk/countermark/519 
GIC 397
circle, incuse, with incuse dot in centre (on reverse)
circular 
6 mm 
 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC IV, 6606 (temporary) Show 2904 1 4.3
RPC IV, 6608 (temporary) Show 2903 1 4.3
RPC IV, 6607 (temporary) Show 2901 1 4.3
RPC IV, 6729 (temporary) Show 2982 2 4.3