Countermark

https://rpc.ashmus.ox.ac.uk/countermark/175 
GIC 54
male head r., ? wearing diadem
oval 
GIC had note "on reverse", but they appear to be on the obverse? 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 1710 Show 1710 9 1
RPC I, 1710 Show 1710 8 1
RPC I, 1710 Show 1710 7 1
RPC I, 1717 Show 1717 1 1
RPC I, 1710 Show 1710 11 1
RPC I, 1710 Show 1710 14 1