In 1769, St. John Island (later known as Prince Edward Island) became a separate colony from Nova Scotia. Charlottetown was appointed the capital of the colony. Canada Post Office issued a stamp commemorating the 200th anniversary of Charlottetown's status as capial on July 15, 1969.

National Archives of Canada
First Day Covers
Canada Post Office Publicity First Day Cover

The Canada Games stamp was issued on the same day.
Shering


Canada Envelope Company


Artopages

Ellliot-Marion

Rosecraft

Cole Cover

H & E

Jackson

Usages
Domestic Letter

Toronto local mail, January 5, 1970
6 cents domestic letter rate