1/2 oz (15.55 g) gold coin Britannia King Charles III, Great Britain 2023

The coin's reverse side still features the lady Britannia, but now has four new additional design elements for added security. These are a special effect background to mimic waves, additional lines on Britannia's shield, Latin text around an inner ring of the coin, and a new holographic spot which changes between a trident and padlock depending on the coin's angle.
The obverse of the coin bears the New First portrait of King Charles III designed by sculptor Martin Jennings along with the monetary denomination of 50 pounds.