- Produced by Tower Mint London and made available through the London Mint Office.
- Each coin is struck in 22 carat gold and finished to a proof standard.
- 2026 commemorates 100 years since the birth of Queen Elizabeth II on 21st April 1926.
- The collection includes Full Sovereign gold coins which reveal the unseen effigies of Queen Elizabeth II by artist Raphael Maklouf, across several decades of her reign, from 1952 to 2022.
- The reverse of each coin features an unseen effigy of Queen Elizabeth II from each decade of her reign.
- The inscription around the top on the reverse of the coins, 'THE RDM MASTERPIECES', is featured, above the unseen effigies of Queen Elizabeth II.
- The inscription, 'THE UNSEEN EFFIGIES', is featured around the bottom, on the reverse of each coin.
- The signature initials 'RDM', of the artist Raphael Maklouf, are positioned on the reverse of the coins at the base of the neck, on the unseen effigies of Queen Elizabeth II.
- The obverse of the coins illustrate the uncrowned portrait of King Charles III, created by Raphael Maklouf.
- The Latin inscription around the obverse of the coins, 'CHARLES III · DEI · GRA · REX · F · D · GIBRALTAR ·', an abbreviation from 'CHARLES III DEI GRATIA REX FIDEI DEFENSOR GIBRALTAR', translates as 'Charles III, by the Grace of God, King, Defender of the Faith, Gibraltar', alongside by the year '2026', in English.
- The initials 'RDM', of the artist Raphael Maklouf, are positioned on the obverse of the coins at the base of the neck, on the uncrowned portrait King Charles III.
- Maximum mintage of 26.
