Watch List notes:

WORLD COINS, SWITZERLAND, Confederation, Gold 20-Francs, 1888 B, Bern mint, head of Helvetia left, rev shield, value and date within wreath, 6.44g (HMZ 2-1194d; F 497). A number of small surface marks, otherwise good very fine and very rare.
mintage of 4224 pieces only

Estimate: £2000-2500