Interesting that the Sept.
Sev. and
Geta examples really do seem to be from the same
reverse die while the two Caracallas (yours and the one pictured in
Varbanov [Bulg.]) share a different
reverse die of their own; meanwhile those
Caracalla examples also seem to be products of different
obverse dies, so the sorting is starting to get interesting. I have a Sept.
Sev. specimen somewhere as well, but the trick is to locate it instantly.
My
Geta example,
AE17, 2.79g: