Probus. Antoninianus. Ticinum. 

IMP C PROBVS PF AVG, radiate bust left wearing imperial 
mantle and holding eagle-tipped sceptre
PROVIDENT AVG, Providentia standing left, holding globe 
and sceptre. 

Left field: Q. 
Mintmark SXXI. 

RIC V-2 489. 

With permission of Roma Numismatics, November, 2009