TREATY OF GHENT POSTAL COVER CELEBRATING THE "WORLDS MOST PEACEFUL BORDER" BETWEEN THE UNITED STATES AND CANADA
William Lyon Mackenzie King OM CMG PC, commonly known as Mackenzie King or by the initials WLMK (1874-1950) Signed Postal Cover, "W. L. Mackenzie King", 6.5 x 3.5, celebrating the December 24, 1814 Treaty of Ghent established a demilitarized border between Canada and the U.S., multiple postmarks Nov 5, 1940 and Canadian three cent stamp, by the dominant Canadian political leader from the 1920s through the 1940s. He served as the tenth prime minister of Canada in 1921–1926, 1926–1930 and 1935–1948. He was the longest serving Prime Minister in Canadian history. In fine condition, with age toning.