Watch List notes:

World Coins, Switzerland, pattern 20 francs, 1871, by Durussel, crowned head l., in circle of stars, date below, rev. HELVETIA, shield of arms between sprigs, value below (KM.Pn19; Fr.492; Richter 2-65 [R2]), certified and graded by PCGS as Specimen 63
(10000-15000 GBP)