10 Dollars - Elizabeth II Solar System

Issued as part of a wave of multi-metal novelty coinage that flooded the collector market in the early 2010s, this piece uses Solomon Islands' nominal issuing authority purely as a licensing arrangement — the coins were designed, produced, and distributed entirely by European minting houses, with the Pacific nation providing legal tender status in exchange for royalties. Six distinct platings applied to a single silver substrate is an aggressive technical claim; whether the rhodium and ruthenium applications constitute meaningful distinct layers or decorative surface treatments is a question the specifications carefully avoid answering.