Can any better eyes confirm my suspicion that this is Allectus? His relatively flat face and prominent pointy beard make me think that it is.
Agree it's Victorinus: Victorinus, AD 269-271. Roman billon antoninianus, 2.63 g, 20.1 mm. Cologne (though CNG attributes this coin to Treveri), AD 269/70. Obv: IMP C PIAV VICTORINVS PF AVG, radiate, draped bust, r. Rev: FIDES MILITVM, Fides standing l., holding two standards. RIC-109; Cohen-36; AGK-5b; De Witte pl. XXVI, 22; Sear-unlisted.
For the record: When I see a post with only one side of a coin shown, I tend to suspect someone is fooling with us trying to make us look stupid. While I don't see the Allectus possibility here, we might have been swayed considerably if we had seen a reverse normally used by Allectus or any particular other candidate. There was a lot of overlap in reverse types but in most cases there are little clues that might separate one from another. For example, below are two PAX AVG coins, one Allectus and one Victorinus. At my level of experience, I might confuse the Allectus with a Carausius but the Victorinus is certain in my opinion. When you ask for help, help the helpers by giving full information which certainly includes the other side of the coin. If you want to play a game to see who you can fool, post it as a game and not a request for help.
Not in my nature to fool anyone Doug. I see your point though, and will do so in the future. It was indeed a Pax reverse, but with little of use visible beyond a vague outline, though that may have been enough. I simply do not have any experience with 3rdC Romans and haven't picked up the tell tale features of a lot of the emperors from that period yet.