Countermark

https://rpc.ashmus.ox.ac.uk/countermark/409 
GIC 286
temple with four columns
circular 
9.5 - 10 mm 
 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 641 Show 641 27 1
RPC I, 642 Show 642 4 1
RPC I, 642 Show 642 7 1
RPC I, 644 Show 644 20 1
RPC I, 647 Show 647 19 1