Probus, AE antoninianus, Ticinum. 

IMP CM AVR PROBVS PF AVG, radiate bust left, wearing 
imperial mantle, holding eagle-tipped sceptre.
SOLI INVICTO, Sol standing facing in spread quadriga.

CM in lower centre.
Mintmark XXI Gamma.

RIC V-2 Cyzicus 911.

Barry and Darling, ebay, Jan 2000. Sold for $78.00