Countermark

https://rpc.ashmus.ox.ac.uk/countermark/543 
GIC 421
lyre (on reverse)
oval 
6 x 4 mm 
 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC IV, 7133 (temporary) Show 1026 1 4.2
RPC IV, 370 (temporary) Show 1002 6 4.2