Very rare issue of Groschen Tournois.
In the largest world archive Coinarchives over many years only 5 records in different types of dies.
Germany, City of Aachen, Groschen Tournois 1374
Obverse: crowned half figure of Charlemagne facing behind Aachen coat of arms holding orb and scepter
KAROLVS MAG-NVS INPERAT
Reverse: in external rim XC:VINCIT | XC:REGN | AN:DNIM | CCC:LXXIIII
in internal rim MON | ETA | IVNC | HEIT
Diameter 28 mm, weight 2.34 g