Here an Carolingian piece from me. Looks like it has been double struck. Nice detail only missing small chip on the edge.
Karel de Kale, AR Denier, Melle
Karolingers. Karel de Kale (840-877). AR Denarius Melle
It is always been some kind of an deal if these coins were from Charles le chauve or Charlemagne because they both minted this same kind of coin.
I can't see the difference though.

