Its a barbarous imitation of Claudius II - DIVO CLAVDIO / CONSECRATIO showing a flaming altar. One of the most common issues around. In the lot of uncleaned coin I received today, I got 2. I wouldnt clean it any further.
Luckily, its an interesting issue - Who issued them? Quintillus didnt rule long enough for there to be so many of them (officially issued, that is). The barbarians probably issued so many because its an easy design to cut a die for (perhaps to train the new Celators before moving on to harder designs like FEL TEMPs)