10 Dollars - Charles III Helvetia

At 0.0622 g, this belongs to the fractional "mini gold" category that several Pacific island nations have leaned on heavily since the mid-2010s as legal tender novelty issues — produced by private minting houses and sold directly to collectors at significant premiums over spot. The Solomon Islands has no domestic gold refining or minting infrastructure; these are struck under license, almost certainly in Europe.

The pairing of Charles III with the Swiss Helvetia figure is a collector-market confection with no monetary or political logic behind it.