Definitely imitative - the crude bust and reverse legend of "IVIIII..." or something along those lines is typical for barbarous imitations.
Likely copying small LRB's of Theodosius, Arcadius, Honorius, et al.
(cf. coins with CONCORDIA AVGGG / cross reverses for one possible reverse type example)
Member
ANA - EAC - TNA - SSDC - CCT #890
"Most of the things worth doing in the world had been declared impossible before they were done." -- Louis D. Brandeis