Countermark

https://rpc.ashmus.ox.ac.uk/countermark/698 
GIC 572
ϚΑϹ (or possibly ϚΑƐ)
rectangular 
8 x 4 mm 
The first letter may be a stigma. The A may be barred orunbarred. The interpretation is uncertain. 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC IV, 6272 (temporary) Show 2379 10 4.3
RPC IV, 9109 (temporary) Show 2349 3 4.3
RPC III, 3795 Show 3795 52 3
Show 108
Show 315
Show 348
RPC III, 3796 Show 3796 11 3
Show 464
RPC III, 3795 Show 3795 53 3
RPC IV, 9109 (temporary) Show 2349 5 4.3
Show 139
RPC IV, 9002 (temporary) Show 2388 4 4.3