Issued to commemorate the 100th anniversary of the Universal Postal Union (1874–1974), this Canadian 15¢ stamp symbolizes global communication and cooperation through the postal system. The classical winged messenger figure with horse reflects speed, unity, and worldwide mail exchange, while the bold red UPU emblem highlights international solidarity. The bilingual inscription honors Canada’s French and English heritage. Clean engraving and strong contrast make it visually striking in albums. A key thematic piece for postal history, UPU, and international relations collectors, especially within 1970s Canada commemoratives.