My Latest Galerius (Reverse Mark?)

Considering what you had to start with you did a super job cleaning up that coin!

If you have access to a microscope that will let you work on the coin while in its field of view, then you might be able to clean up some of the lettering on the reverse using a needle or dental pick, but that would be frosting on the cake. If you do that, be sure to hold the instrument close to its tip to avoid uncontrolled springing.

I would remove that occlusion you were asking about, since it is not a letter gamma as someone suggested. Wrong shape for that and entirely inappropriate for the issue as designed. See Sutherland in RIC VI (as mentioned by Albert) for details on how the series had developed at Heraclea up to this point. It will tell you what should be there, and what should not.

very nice,good work.albert