I believe the coin is really of Galerius. Here is mine: RIC VI Aquileia 81a, page 323, for Galerius from 25 July 306-c. March 307. Mazini IV, plate LXXXVI.616 thought it was Maximian, but that was long ago. Now it is attributed to after the abdication when Galerius took the title Augustus and used a legend that can be mistaken for that of Maximian. The OP coin is excellent and the type is rare, although RIC calls it scarce. It is also issued for other rulers. Does anyone have one to show?
I am under the impression that coins of Galerius have either GAL or at least G in the obverse legend. I don't see either of these in the OP coin.
So many threads I miss and can't keep up with That's a very cool variant of a type I would happily add to my collection! Another area of confusion between Maximianus and Galerius...and just when I thought I had it clear in my mind
Prior to the abdications of 305 there were two rulers named "Maximianus". Then the "G" was used to distinguish Galerius. After 305 there was only only one "Maximinianus" -- the one we call Galerius. One way to tell is by the nose. Maximianus Herc had a ski nose or a bulbous nose, almost aways quite evident on the coin portraits. Galerius did not. The OP coin and mine are of Galerius.