500 Pounds - Charles III 1 kg Fine Silver

The one-kilogram silver format was established under Elizabeth II and carried forward almost unchanged into the new reign — a deliberate continuity decision by the Royal Mint during a transition period when design approvals and effigy authorizations were moving through multiple institutional sign-offs simultaneously. The Jody Clark obverse portrait of Charles, first approved for coinage in 2015 while he was still Prince of Wales, was adapted for sovereign coinage with unusual speed following the Queen's death in September 2022.

KM#2577 spans two calendar years of issue, suggesting sustained demand rather than a single limited release.