Only the 3rd example of this exact type (with the additional P F in obverse legend) known!
OBVERSE: IMP C PROBVS P F AVG
REVERSE: CONSERVAT AVG; Sol in temple
BUST TYPE: B = radiate, cuirassed bust right
FIELD / EXERGUE MARKS: -/-//BXXI
WEIGHT 3.66g / AXIS: 1h / WIDTH 21-22 mm