1952 - 1977
postmarked in 1977 with 6 Great Britain stamps (three maroon, two light blue and one light green)
Where the writing on the back is, it is mostly covered up with stamps, I can make out this:
The Tower of London at Night
- - - - - - - - - - - - - - - - - - - - - - -
The Silver Jubilee of Elizabeth II marked the twenty-fifth anniversary of Queen Elizabeth II's accession to the throne of the United Kingdom, Canada, Australia, New Zealand, and other Commonwealth realms. It was celebrated with large-scale parties and parades throughout the United Kingdom and the Commonwealth throughout 1977, culminating in June with the official "Jubilee Days," held to coincide with the Queen's Official Birthday.
On 6 June, the Queen lit a bonfire beacon at Windsor Castle, whose light spread across the night in a chain of other beacons throughout the whole country. On 7 June, crowds lined the procession to St Paul's Cathedral, where the royal family attended a Service of Thanksgiving alongside many world leaders, including United States President Jimmy Carter, as well as all of the living former Prime Ministers, stretching back from Harold Macmillan all the way to Harold Wilson. The service was followed by lunch in the Guildhall.