Skip to product information
1 of 4

2026 King Charles III 'The Penny Drops' £5 Gold Proof Coin

2026 King Charles III 'The Penny Drops' £5 Gold Proof Coin

Regular price £5,195.00 GBP
Regular price Sale price £5,195.00 GBP
Sale Sold out

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

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.


Coin Specifications

Denomination £5
Limited Edition 100 (Total Mintage 110)
Alloy 22 Carat Gold - 917/1000 fineness / Contains 1.177 Troy Oz
Weight 39.94 g
Diameter 38.61mm
Obverse Designer Martin Jennings
Reverse Designer Christian Davies and Matt Dent
Edge Inscription · STANDING ON THE SHOULDERS OF GIANTS
Struck by the Royal mint : Llantrisant 



We endeavour to keep all years available, the image is of the coin you will receive some years may not be available due to rarity, if you are interested in the rare examples not on offer here, please contact us

Should you not be entirely happy with your purchase you may return it for a full refund, please see our returns section for more information.
View full details

Ask about this coin or view our knowledge base for more information