Countermark

https://rpc.ashmus.ox.ac.uk/countermark/555 
GIC 434
star (or rosette) of six rays
circular 
4 - 4.5 mm 
This cmk is similar to https://rpc.ashmus.ox.ac.uk/countermark/1373, It is separated due to the western Greek origin of the coins from Zacynthus, and a presumed Pontic origin for the coins attributed to Augustus of "Coinage with Q" 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 1290 Show 1290 20 1
RPC I, 1290 Show 1290 19 1
RPC I, 1290 Show 1290 18 1
RPC I, 1290 Show 1290 17 1
RPC I, 1290 Show 1290 16 1
RPC I, 1290 Show 1290 15 1
RPC I, 1290 Show 1290 14 1
RPC I, 1290 Show 1290 13 1
RPC I, 1290 Show 1290 12 1
RPC I, 1290 Show 1290 11 1
RPC I, 1290 Show 1290 10 1
RPC I, 1290 Show 1290 9 1
RPC I, 1290 Show 1290 8 1
RPC I, 1290 Show 1290 7 1
RPC I, 1290 Show 1290 6 1
RPC I, 1290 Show 1290 5 1
RPC I, 1290 Show 1290 4 1
RPC I, 1290 Show 1290 3 1
RPC I, 1290 Show 1290 2 1
RPC I, 1290 Show 1290 1 1
RPC I, 1291 Show 1291 3 1
RPC I, 1291 Show 1291 2 1
RPC I, 1292 Show 1292 1 1
RPC I, 1290 Show 1290 22 1