100 Dollars - Elizabeth II Greek Helmet

The 2022 Solomon Islands high-denomination silver kilo series has no meaningful monetary connection to the issuer — these pieces are produced under licensing arrangements for the collector bullion market, with the Solomon Islands nominal authority used primarily for legal-tender face value assignment. The practice became widespread among Pacific island nations after Tuvalu and Niue demonstrated its commercial viability in the 2000s.

Greek helmets of the Corinthian type were produced in such quantities during the 7th and 6th centuries BC that surviving examples now appear regularly at auction — the coins commemorating them are almost certainly more expensive than many of the originals.