I was curious what experienced ancient collectors would say about the grade, because I don't see ancients graded "AU" very often. If I sent in an ancient to get slabbed by NGC, I would hope they would determine the mint, if at all possible
--by cross-referencing if needed. In other words--make a serious
effort for my money.
Focusing on ancients that are slabbed is a needless and limiting pursuit--imo
Simply because respected dealers of ancients can guarantee authenticity just as well
as any TPG
. And since later Roman AEs aren't commonly faked, the issue of authenticity is largely moot--correct attribution is more important. Another limiting factor to slabbing is how many ancients simply will not fit into TPG
holders. And once a coin is encapsulated, the main aspect of ancients I enjoy most--the details--are one step removed by those plastic coin coffins.
This is not a critique of your coin--it's very nice!
I'm just a critic of slabbing as it pertains to ancients, because it doesn't have to limit the collector.