1972 Earth Sciences Congresses
Canada Post Office issued four stamps which appeared se-tenant on miniature panes of sixteen stamps. The stamps, designed by Fritz Gottschalk, were released on August 2, 1972.
The geography stamp is an abstracted bird's eye view of a village situated at the intersection of main and secondary roads.
The geology stamp illustrates a cross-section of the crust of the earth showing different layers of materials.
The cartography stamp shows a simplification of mountains drawn in schematic shape by using "Sigfried" lines.
The photogrammetry stamp is a visual simplification of the theme of the Congress.
First Day Covers
Canada Post Office Publicity first day covers
Canada Post Office "Official" first day cover and insert
International Air Mail
The stamps were issued in 15 cent denominations "suitable for use on mail destined for a large part of the earth's surface". The international "all-up" letter rate was 15 cents for each ounce.
Mission City to Munster, Germany, December 15, 1972
15 cents international letter rate
To the United States
Ottawa to Orange, Mass., August 24, 1972
10 cents air mail rate + 50 cents registration fee