1 Pound - Elizabeth II Centenary of the House of Windsor

The House of Windsor name was adopted by royal proclamation on July 17, 1917, a direct response to anti-German sentiment during the First World War — the family's previous dynastic name, Saxe-Coburg and Gotha, had become a political liability. Tristan da Cunha, administered through Saint Helena, issues coins primarily through the Pobjoy Mint for collector markets, as the island's actual population has never exceeded 300 and sustains no meaningful coin circulation.