The KAA-Z issue at
Rome is a very well structured and coherent one, even to details, so a voluntary production of a limited serie of abnormal coins would seem very improbable.
‘Minting errors’, in fact mostly explainable hybrids, are even not common during this issue : a limited number of hybrids when
Carinus and
Numerian were promoted to the rank of
Augustus and a few hybrids with
PIETAS AVGG and
ORIENS AVGG for
Carinus when he took over
his brother’s reverses after the latter’s death. In the LaVenèra
hoard only four coins of
Numerian (busts A and B) have an appropriate
reverse (
IOVI VICTORI - taken over from
Carus after
his death) but marked with
officina A (two of them from a single die) instead of
officina B one of those attributed to
Numerian.
So the two coins of
Numerian (busts B and A2) with the
FIDES MILITVM reverse, normally used by
Carinus, are exceptionnal errors, especially as the
obverse and
reverse dies are all different. Moreover during the long lasting issue KAA-Z (end 282 to end 284) the busts A or B and A2 were not used at the same time: according to the study of the LaVenèra
hoard the first ones were both used during September 283-January 284 and the second one (A2) during October-November 284. So this points to two separate plain ‘errors’, a mere coincidence.
