Probus (276-282).     BI Antoninianus, Ticinum mint, 280 AD.   Obv.    IMP C PROBVS AVG. Radiate and mantled bust left, holding eagle–tipped sceptre.        Rev.   MARTI PACIF. Mars advancing left, holding branch, spear, and shield; in left field, I; in exergue, QXXI.     RIC V 508.     4.29 g.   23.50 mm.          Good VF.