This set contains three sovereign coins, each marking a different jubilee of Queen Elizabeth II.
The Mint says about it:
"Coins from The Sovereign family have marked many special moments for Her Majesty The Queen, including the jubilee festivities that have taken many forms through the years. The Half-Sovereign has been struck for all of The Queen’s jubilee anniversaries, with each coin bearing a commemorative design created especially for the historic occasion it marks.
In 2022, the year of Her Majesty The Queen’s Platinum Jubilee, we honour her remarkable reign with three special Half-Sovereigns presented together in a case. Struck in half the weight of The Sovereign, the Half-Sovereign carries the same design as its larger counterpart, capturing each event and design detail, in equally fine quality. The set includes the Half-Sovereigns that marked The Queen’s Golden and Diamond Jubilee years along with a 2022-dated Half-Sovereign to mark the Platinum Jubilee. A booklet about The Queen’s extraordinary reign and these celebratory coins also accompanies the set."
The grade of all coins is listed by the Royal Mint as "bullion", meaning Brilliant Uncirculated for the 2022 half sovereign, and probably coins from the secondary market for the other two coins.