Probus, AE antoninianus, Siscia. 

IMP CM AVR PROBVS PF AVG, radiate bust left, wearing 
imperial mantle, holding eagle-tipped sceptre.
ROMAE AETERNAE, hexastyle temple with Roma seated left
within, holding Victory and sceptre.
Mintmark XXIT.

RIC V-2 Siscia 737. 

Ebay sale by WCNC, 30th March 1999. Sold for $17.01.