The Britannia gold bullion coin is one of the most popular investment coins in the world. It is produced by the British mint called The Royal Mint. Since 2013, Britannia has been minted from ore with a very high fineness of 999.9 and the purity of the metal. Production of Britanni began in 1987 and it was the first European investment coin. Initially, it was made of 22 carat gold with a small admixture of copper. It did not last long, because in 1989 copper was replaced with silver. However, since 2013, it has been decided that Britannia will be produced only from pure 24-carat gold. Today, Britannia is also famous for many innovative security features used by The Royal Mint, such as:
 
 • Micro-engraved text "DECUS ET TUTAMEN" above Britanni's head, made with precision lasers.
 • The Tincture technique is used on the Britanni title shield - this technique shows heraldic colors with symbols and lines.
 • Engraved security with angular effect - image changes from a padlock to a trident.
 
 On the obverse of the British zloty  The Britannia coin from 2021 features an image of Queen Elizabeth II. Her Majesty is shown here in profile, wearing the crown of the state diadem of George IV. King George IV ordered the crown in the first year of his reign in 1820. The crown contains 1,333 diamonds weighing over 300 carats in the setting.
 
 British zloty reverse  The investment coin features an image of the mighty Britannia standing along the coast, helping to guard the empire. Philip Nathan is the author of this modern image of Britannia. The artist painted the image of Britannia on the occasion of the 1987 debut of the gold coin in this series.