10 Pounds - Elizabeth II Queen Elizabeth II

Alderney's large-format silver issues of the mid-2000s were produced under the authority of the Alderney (Coinage) Law 1993, which granted the island — the smallest of the four main Channel Islands — its own distinct commemorative coinage rights separate from Guernsey's broader monetary arrangements. The pieces were struck by the Royal Mint on contract and are legal tender on the island in a purely nominal sense, with face value bearing no relationship to bullion content.

Without confirmed specifics on what this 2006 issue commemorates, the physical facts do the talking: at 155.5 g, it belongs to the five-ounce format favored by collectors rather than anything approaching circulation use.