Four First Class and four £1.70 square stamps presented as two horizontal se-tenant strips.

February 2020: A visit to the headquarters of MI5 in London First Class

October 1957: With His Royal Highness The Duke of Edinburgh in Washington, during a tour of the United States First Class

April 1980: On a walkabout in Worcester First Class

June 1978: During Trooping the Colour in London First Class

May 2005: After touring the Provincial Museum of Alberta in Canada £1.70

June 1977: During the Silver Jubilee celebrations in Camberwell £1.70

February 1966: In Victoria Park, St Vincent, during a tour of the West Indies £1.70

June 1999: At the Order of the Garter ceremony in Windsor £1.70

Stamp specifications 

Stamp format Square

Stamp size 35mm x 35mm

Design Kate Stephens

Printer International Security Printers

Print process Lithography

Perforations 14.5 x 14.5

Phosphor Bars as appropriate

Gum PVA