50 Dollars - Charles III Heidi, Girl of the Alps

Heidi, published by Johanna Spyri in 1881, became one of the best-selling books ever written in the German language and remains Switzerland's most exported cultural property — a fact that has made it a recurring subject for commemorative issues from mints with no geographic connection to the story whatsoever. Cook Islands has issued gold in this weight class under licensing arrangements for decades, typically targeting the European collector market where the underlying IP carries genuine nostalgic weight.