Very nice stamp.
The traditional English then British coronation crown since the 13th century. The original crown was a holy relic kept at Westminster Abbey, St Edward's burial place, until the regalia were either sold or melted down when Parliament abolished the monarchy in 1649, during the English Civil War. The current St Edward's Crown was made for Charles II in 1661. It is only used at coronations of the monarch and not worn on any other occasion. It has been used at a number of coronations since the restoration of the monarchy in 1660, but not, in fact the majority. The monarchs crowned with St. Edward's Crown were Charles II (1661), James II (1685), William III (1689), George V (1911), George VI (1937) Elizabeth II (1953) and Charles III (2023). King Edward VII intended to be crowned with St. Edward's Crown but in the event used instead the lighter Imperial State Crown (St Edward's Crown being judged too heavy for the King to wear soon after his illness).