Ten Pounds 2019 Tower of London - The Ceremony of the Keys 5oz. Gold Proof S.M15 Reverse: Lamp and The Keys to the Tower, a few scattered tiny nicks, otherwise FDC in the Royal Mint box of issue with booklet describing the history of the keys and ceremony dating from 1340, and certificate number 11 of just 45 issued, with only 35 issued in this format. The Tower of London gold series is proving to be a popular issue in both gold and silver with many collectors obtaining the full set of issues Crown Jewels, Ceremony of the Keys, Yeoman Warders and Legend of the Ravens types