5 Pounds - Elizabeth II 65th Ann. Coronation, Silver Proof

Alderney, the smallest of the four main Channel Islands, has issued commemorative coinage under Crown dependency arrangements since the 1990s — politically British, but outside the United Kingdom proper. The 65th coronation anniversary fell in 2018, an interval celebrated largely because Elizabeth II had by then become the longest-reigning British monarch in history, surpassing Victoria in 2015.

The 28.28g sterling silver specification is shared by virtually every commemorative Crown-sized issue from this jurisdiction, produced through the same contracted minting arrangements used across multiple Channel Island issuers.