25 Pounds - Elizabeth II Titanic

Issued to mark the centenary of the Titanic's sinking, this Alderney piece is a Crown dependency commemorative — a category flooded with collector-targeted issues that rarely see circulation. Alderney, the smallest of the inhabited Channel Islands with a population under 2,000, has no independent monetary policy; its coins are legal tender in theory but exist almost entirely as numismatic products sold at a premium over melt. The 2012 Titanic commemorative market was exceptionally crowded, with mints across multiple jurisdictions releasing competing issues simultaneously for the April anniversary.