Watch List notes:

SWITZERLAND. Zürich. Fraumünsterabtei, 13th century. Vierzipfliger Pfennig (Silver, 20 mm, 0.40 g). ZVRICH+ Head of Saint Felix to left. Rev. Incuse of obverse. H.U. Geiger and R. Schnyder: Der Münzfund von Winterthur-Holderplatz, in: SNR 53 (1974), 20-46. HMZ 1-619a (same die as illustration). Rare. A beautifully toned and sharply struck example. About extremely fine.