Nice patina and great details.
Obverse: IMP C PROBVS P F AVG
Reverse: SOLI INVICTO = sol in quadriga to left
BUST TYPE: F1 = radiate, cuirassed bust left, holding spear and shield
FIELD / EXERGUE MARKS: -/-//XXIP
WEIGHT 3.61g / AXIS: 6h / WIDTH 21-22mm