1952-1992 Fortieth Anniversary of the Accession
This is an awesome card.
First, it is a card of Queen Elizabeth II.
Second, it appears to be from 1992, which meant that this card was 23 years old by the time I got it in 2015.
Thirdly, it is a Maxicard. Maxicards are postcards with a stamp of the same image as the card (or a related image) and cancellation. The stamp here on this card was canceled on the first day of issue, February 6, 1992 in Truro, Cornwall.
The sender had purchased a bunch of unused postcards at a charity shop and saw that I like royalty cards and sent it to me! What a great find!