Probus, AE antoninianus, Siscia. 20-22 mm, 3.21 g. 

IMP C M AVR PROBVS P AVG, radiate bust left in imperial 
mantle, holding eagle-tipped sceptre.
ABVNDANTIA AVG, Abundantia standing left, emptying cornucopiae.
Mintmark XXIS.

RIC V-2 Siscia 617 var (obv legend and bust type); Hilard-Oliva 13 (this coin).

With permission of auctiones.ch, eAuction #42, Lot 96. corr.
Estimate: CHF 50.00