This stamp's micro-printed date is found in the bottom-left corner.
This stamp was the first Canadian stamp to include the designer's initial. The letter H is found in the bottom-right corner of the stamp, which the initial of Emanuel Otto Hahn.
This postage stamp replaced the 7-cent Postal Centennial Commemorative issue used since September, 1951. With this stamp the Department discontinued the marking of the 7-cent denomination specifically for airmail use. The stamp features this subject to suggest airmail. The 7-cent denomination, although intended for general postal use, extensively prepays airmail postage. This is not an airmail stamp.
A Canada goose (branta Canadensis) leaving the water and becoming airborne.