50 Dollars - Elizabeth II Royal Orb

Issued to mark the 25th anniversary of Elizabeth II's coronation, this piece was part of a broader wave of Commonwealth commemoratives produced in 1978. The Cayman Islands had only adopted its own currency in 1972, following the introduction of the Cayman Islands dollar under the Currency Law of that year — making this relatively early in the territory's numismatic history.

The .500 fine gold specification is worth noting: half-gold alloys were common in lower-denomination commemorative gold of this period, allowing issuers to hit accessible price points without sacrificing the prestige of a gold attribution.