That's an interesting coin - seems like it's probably official.
It reminds me of the RIC 167 footnote of a coin in the Copenhagen hoard from the unlisted Ticinum "crescent + star" issue where the star is in exergue vs normally above the "VOT".
I don't suppose you have the Copenhagen hoard report (Bahrfeldt) ? I was just looking for it this morning, hoping to find it online.