Watch List notes:

Switzerland, Confederation, nickel 20-rappen (17), 1924, 1925 (2), 1926, 1927 (2), scarce, 1929, 1930 (2), 1931 (2), 1932 (2), 1933, 1934, 1936 (2) (HMZ 1208; KM.29), very fine to extremely fine; and an incomplete run of dates of cupro-nickel 20-rappen (22), 1939-1964 (HMZ 1208; KM.29a), these extremely fine, a few better (39)

Estimate: 80 - 120 GBP