- Produced by Tower Mint London and made available through the London Mint Office.
- 2026 commemorates 100 years since the birth of Queen Elizabeth II on 21st April 1926.
- Part of a collection which includes Half Crown, One Crown and Two Crown coins.
- The reverse of the coin features the unseen effigy of Queen Elizabeth II, a never before seen portrait created by artist Raphael Maklouf.
- The unseen effigy, titled 'The Young Queen', represents first decade of Queen Elizabeth II from 1952 to 1962, where she assumed a role defined by responsibility, offering stability and hope to a nation rebuilding after war.
- The inscription around the top on the reverse of the coin, 'THE RDM MASTERPIECES', is featured, above the unseen effigy of Queen Elizabeth II.
- The inscription, 'THE UNSEEN EFFIGIES', is featured around the bottom, on the reverse of the coin.
- The signature initials 'RDM', of the artist Raphael Maklouf, are positioned on the reverse of the coin at the base of the neck, on the unseen effigy of Queen Elizabeth II.
- The obverse of the coin illustrates the uncrowned portrait of King Charles III, created by Raphael Maklouf.
- The Latin inscription around the obverse of the coin, 'CHARLES III · D · G · 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', followed by the year '2026', in English.
- The monetary value of 'Half Crown', is displayed around the bottom, on the reverse of the coin.
- The initials 'RDM', of the artist Raphael Maklouf, are positioned on the obverse of the coin at the base of the neck, on the uncrowned portrait King Charles III.
- Maximum mintage of 500,000.
