AI Description provided by ebay:

The Royal Wedding First Day Cover 1981 Charles & Diana is a vintage collectible item commemorating the historic wedding of Prince Charles and Lady Diana in 1981. This stamp features British Royalty and bears the theme of Royalty, making it a valuable piece of historical memorabilia from the United Kingdom. Perfect for collectors interested in royal weddings and British history, this item serves as a timeless reminder of one of the most iconic events in recent royal history.