25 Pounds - Charles III The Lion & The Eagle; 1/4 oz Fine Gold

The Lion & The Eagle is a joint issue between the Royal Mint and the United States Mint — a pairing with no modern precedent — released as part of a bilateral numismatic program marking the long-standing relationship between the two nations. Each mint produces its own denomination in its own gold standard, with the Royal Mint striking to .9999 fineness against the American Eagle's traditional .9167.

The 2026 date places this coin in the semiquincentennial year of American independence — the 250th anniversary — which is the explicit occasion for the collaboration.