i bought this coin from a bargain bin for $2 as a 5th century monogram nummus, expecting to identify it more precisely at home.
(The seller had entirely no idea, attributing the coin to the 3rd century.)
However, I can't figure out which particular monogram this is, if any (nothing I can find online fits at all).
For what it's worth, the diameter is 13 mm, which is, IIRC, actually a bit high for a real 5th century monogram nummus (but still well within AE4 territory, and I have no idea what
else it could be).

Reverse. Note the weird monogram. (Sorry for the awful pic, still smartphone camera.)

Obverse. Not much visible, sorry. (In hand what's left of the bust does look about right for 5th century.)

My best guess at the monogram (I might have missed some parts, but all the lines on this picture are definitely there, except perhaps the top bar).
...Any ideas?
My best guess is Marcian, but that doesn't have any E in it.
Only ones online that are remotely close are Ravenna and Libius Severus/Ricimer (though one of the "Vandals for Marcian" monograms is also very close).