100 Dollars - Elizabeth II Neptune

Barbados adopted the Barbadian dollar in 1973, severing its currency tie to the East Caribbean dollar as part of a broader assertion of financial independence following full independence in 1966. This gold issue appeared a decade later, during a period when several small Caribbean nations were producing low-fineness gold commemoratives aimed squarely at the collector market rather than circulation — the .500 fineness being a direct cost concession to keep the series commercially viable.