Probus, Antoninianus, Ticinum, 24 mm, 4.27 g. 

IMP C PROBVS AVG, radiate bust right, wearing imperial 
mantle, holding eagle-tipped sceptre.
SECVRIT PERP, Securitas standing left, leaning on column, 
legs crossed, right hand raised to head.

I in right field.
Mintmark VIXXI.

RIC V-2 Ticinum 525 var (bust type); Lanz 114, 725.
Rare.

With permission of Numismatik Lanz, Auction 114, lot 725, May 2003.