A note on the capricorns: they were the emblem of the Fourteenth Legion so only belonged on its standards.
At Rome, the standards of LEG XIIII generally have the capricorns, while those of all other legions generally don't. However, there were mistakes in both directions: occasionally the standards of XIIII omit the capricorns, and quite a few of the other legions also have one or two rev. dies where their standards are wrongly ornamented with capricorns.
Doug,
I already explained above that yes, many legions apart from XIIII occasionally get capricorns on their standards at
Rome, by error in my opinion, because according to other sources the
capricorn WAS the emblem of XIIII, but was NOT the emblem of those other legions, and because in general the emblems of the various legions were not added to their standards in Septimius'
legionary series, the sole exception being the
capricorn for
his favorite legion, XIIII.
III ITAL is one of the legions that sometimes gets capricorns at
Rome, so yes, it is possible that
Alexandria copied one of these
Roman coins with capricorns for its own
legionary type, blundering the
Roman legend LEG III ITAL to LEG III ITAVI or ITAVG.
The difficulties with this theory are (a) why the misspelling of ITAL, (b) why should
Alexandria select this legion instead of the emperor's favorite, XIIII? Just rote copying of the first Rome-mint
denarius that the Alexandrian
mint saw, with no understanding of the background and importance of the
type?
I have no idea how to explain the difference between ITAVI and ITAVG on the Alexandrian
denarii, though yes I am inclined to suspect ignorance and error. How do you explain this variation?