Stanley Gibbons Baldwin’s is set to auction a spectacular commemorative coin, The Crown Coin, at its upcoming London sale on September 25. Valued at up to GBP 3 million (approximately $4 million), the coin celebrates Queen Elizabeth II’s historic Platinum Jubilee in a dazzling display of craftsmanship and royal heritage.

Crafted from 24-karat gold and adorned with 6,426 GIA-certified diamonds totaling 483.57 carats, the coin is a one-of-a-kind piece. At its core lies a 1-kilogram gold coin bearing a face value of GBP 10,000 ($13,644), legally recognized as tender. Surrounding it are ten 28-gram coins, each featuring official portraits from Queen Elizabeth II’s reign and representations of the Queen’s Virtues, inspired by the Victoria Memorial.

The design also incorporates intricate motifs from the queen’s tiaras, and the obverse showcases a gold and diamond-encrusted Union Jack. The entire piece weighs 3.61 kilograms and spans 235 millimeters in diameter.

Commissioned by The East India Company—a name steeped in over 400 years of royal association—the coin reflects a legacy that began with Queen Elizabeth I’s royal charter in 1600. By 1677, King Charles II granted the company the rare right to mint its own coinage, and in 1835, King William IV allowed the use of the monarch’s effigy—traditions that continue to echo in this extraordinary creation.