Rupert,
The
obv. legend takes precedence: since this one ends
COS II, it belongs to the
COS II series.
Many
rev. types are shared between
COS II and
IMP II coins. So here is another.
I already knew a couple of similar
denarii, including one from the same dies as yours, in an unillustrated group lot of CNG's sale of the Marc Melcher
collection.
The
COS II legends like yours with some omitted letters are odd. The
style of such coins is very like that of
IMP II coins. So they are an interesting piece in the puzzle of the chronological and geographical relationship of the
COS II and
IMP II series.
As I stated in my long discussion of these Eastern series several years ago on
Forvm, Mattingly's
mint names for these series cannot be maintained.
COS II must be not
Emesa, but the direct continuation of Niger's coinage, so either
Antioch, or, more likely, the
Antioch mint moved to
Laodicea as
part of Septimius' punishment of
Antioch for its adherence to Niger.
When and where the
IMP II series was struck remains entirely unknown. As stated above, the question is how it relates to the
COS II series. The title
IMP II is enigmatic, because it seems certain that these coins were not struck at the end of 193, when Septimius actually bore that title, but rather about a year later, when he was
IMP V!