Denarius, type 4

Obverse

Obverse legend

Reverse legend

Reverse

CARo _ LVS (inscribed in two lines with a star in the middle, one globule to the right of the letter R).

VIRDVN (circular legend around a circle with four small dots connected by two lines (cross?), a cross between the letters N and V).

Photo of the copy preserved at the Bibliothèque Nationale de France (public domain), link to the page of their website showing the photo of the coin: https://gallica.bnf.fr/ark:/12148/btv1b10412566t.r=charlemagne%20denier%20verdun?rk=42918;4. This is most likely the copy illustrated in old works (same centering, lettering and very close blank form).

Seems never to have gone on sale.