The Triumph of Probus

Obverse:
IMP PROBVS PF AVG Draped and cuirassed bust facing right. Just a hint of ornate armor and regal robes remain on this coin. Though sharply struck, it has considerable thick, grey patina.

Reverse:
FIDES MILITVM, H thunderbolt E in exergue. Fides standing facing viewer holding two standards.

The coin is listed in David Sear's Roman Coins and their Values as s3379.