50 Pence - Elizabeth II HRH Duke of Edinburgh - 2021, Silver Proof

Prince Philip died on 9 April 2021 at Windsor Castle, aged 99, and the Isle of Man Treasury moved quickly to issue commemorative pieces that year. The island has a long history of producing collectors' coinage tied to British royal events — often faster to market than the Royal Mint itself — and this silver proof was part of that pattern.

Philip held the title Duke of Edinburgh from 1947 until his death, a grant made by George VI the day before the wedding.