Watch List notes:

CAROLINGIANS. Charles (the Simple), as Charles IV, king of West Francia, 898-922. Denier (Silver, 21 mm, 1.11 g), Metalo (Melle) mint. + CΛRLVS REX R around cross pattée. Rev. MET-ΛLO in two lines. MG 1372. Fécamp 8381-7. Beautifully toned with attractive golden areas. Very fine.
From an collection of a Swiss engineer formed from 1880s until 1926.