1 Quetzal National Bank of Guatemala

Guatemala's quetzal was introduced in 1925 to replace the peso at par, named for the resplendent quetzal — the bird whose tail feathers served as currency among the pre-Columbian Maya. The Banco de Guatemala itself was established only in 1946, separating central banking functions from the commercial Banco Central that had issued currency since the 1920s.

The .925 silver composition places this squarely in the collector-issue category rather than circulating coinage; Guatemala had abandoned silver in everyday commerce decades earlier.