The
style on this one is so
good (not official though), that rather than "barbarous" origin I wonder if it might be a coin minted by someone that worked at a
mint.
Constantine had this to say in A.D. 321--
"Since some imperial minters are secretly and criminally engaged in the coinage of
counterfeit (
adulterinus)
money, all shall know that the necessity is incumbent on them of seeking out such
men, that they be tracked down and delivered to the courts, so that they may forwith betray the accomplices of their deeds through torture and thereupon be sentenced to suitable punishments."