This set contains three sovereign coins, each marking a different jubilee of Queen Elizabeth II.
The Mint says about it:
"The Sovereign has marked many important moments for Her Majesty The Queen throughout the years. We celebrate her extraordinary 70-year reign with three special Sovereigns presented together in a case for this historic occasion. The set includes the Sovereigns that marked The Queen’s Golden and Diamond Jubilee years along with a 2022-dated Sovereign for Her Majesty’s Platinum Jubilee. A booklet about The Queen’s extraordinary reign and the 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 sovereign, and probably coins from the secondary market for the other two coins. | 
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