CARo _ LVS (inscribed in two lines, one globule in the middle between the letters A and V).
SCI - CRVCI (circular legend around a cross, two globules at the end of each branch of the cross and one globule at each corner except the upper right corner).
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/btv1b10442341x.r=charlemagne%20denier?rk=3669546;0.
|N°||G||F||XF 40||AU 58||MS 63||MS 65|
Seems never to have gone on sale.