Asses (or Assarii) were usually larger than this coin, ~25 mm. The
tight flan is also characteristic of
Severus Denarii, too. Shanxi is very likely correct that this coin is intended to resemble a L SEPT SEV
AVG IMP XI
PART MAX type. It is also likely of the
COS II or III P P
type. You can even see the last P on the
reverse near Victory's feet.
However, instead of being an imitation, I think this is probably a
Limes Denarius.
Limes are quite common during
the Severan period, and given that everything left of the coin resembles official
style other than the metal, I would lean that direction. It would be hard to tell the difference at this point, much less if that difference is even meaningful.
So, an
approximate attribution:
Septimius Severus Limes Denarius. Uncertain
mint, Circa 200 AD. L SEPT SEV
AVG [
IMP XI
PART MAX], laureate
head right /
COS [II?] P P,
Victory advancing left, holding
wreath and
palm.
Limes of
RIC 125 (
RSC 96), 503a (
RSC 96),
RIC 504 (
RSC 100), or similar.