Hello,
About this
Probus aurelianus from
Siscia with Latin/Greek marks : I know 10 coins, including your coin (which by the way once belonged to Simon Luethi's
collection), with this description Alföldi 88/1.
It belongs to emission 5b, following my own classification, which is datable end 280 AD.
This series
VICTORIAE AVG has been minted only in four
officinae, //KAP-//KAQ [ //KAS exists, but Alföldi 88 didn't know any of these coins].
The other main
reverse of this small series
CLEMENTIA TEMP, P//KA-VI//KA has been minted on a larger
scale and appears in all the six
officinae in service in
Siscia at that time.
Nice coin!
Sylviane
Estiot