Denarius

Obverse

Obverse legend

Reverse legend

Reverse

CARLM (the letters C, A, R, L and M under a tilde).

AR (the letters A, R and  under a tilde, a comma under the letter R and a globule under the letter ).

One 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=2378204&viewType=detailView. This is most likely the copy illustrated in the old works.

The comma on the reverse is probably a globule with a die break. Maybe a globule also on the obverse in the letter M, but difficult to be sure.

Seems never to have gone on sale.