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Latest Release News

2026 King Charles III 'The Penny Drops' £5 Gold Proof Coin + Boxed / COA - Issue limit 100

Developed as the centrepiece of The Great British Treasure Hunt, this coin forms part of a unique collectible experience combining numismatics with puzzle-solving and discovery. Designed as both a collector’s piece and an interactive challenge, it gives owners the opportunity to take part in a nationwide treasure hunt.

The design is inspired by the legacy of Sir Isaac Newton, reflecting his long association with the Royal Mint and his lasting contribution to science and innovation.

View The Penny Drops £5 Gold Proof

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