HLVDOVVICVS IMP (circular legend around a cross surrounded by a circle made up of dots, a cross between the letter P and the letter H).
TREV _ ERIS (inscribed in two lines).
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/btv1b10412548w.r=louis%20le%20pieux?rk=1030048;0.
Yet another copy preserved at the Münzkabinett der Staatlichen Museen of Berlin, link to the page of their website showing the photo of the coin: http://www.smb-digital.de/eMuseumPlus?service=ExternalInterface&module=collection&objectId=2355498&viewType=detailView.
|N°||G||F||XF 40||AU 58||MS 63||MS 65|
Seems never to have gone on sale.