Denarius Identity Crisis - Caracalla with Geta Portrait, Plautilla reverse

Recent acquisition from a job lot, mixed in with some other Severan denarii

Caracalla
AR Denarius, Ancient imitation?
ANTONINVS AVGV BRIT, Laureate bust with features of Geta right
CONCORDIAE, Concordia seated left, holding patera and cornucopiae
RIC 360 (for reverse)



Despite its appearance, the coin is a full 3.22g, thus it is probably not a fourree. Likewise, considering that this reverse type was made nearly a decade before the Severans' British campaign (and 5 years after her exile). I would thus assume this to be some sort of ancient imitation, rather than a mint error or an outright counterfeit. Regardless, it is of remarkable style and had me fooled until I realized the obverse spelling errors.

Anyone have any insights or similar coins to this one?