Issued by Portugal in 1969, this commemorative stamp marks the 50th anniversary of the International Labour Organization (1919–1969). The modern symbolic design shows clasped hands holding industrial tools, representing worker solidarity, cooperation, and global labor rights. Designed by J. Abel Manta and printed by Casa da Moeda, the bold geometric background reflects late-1960s graphic style. This issue forms part of worldwide philatelic tributes to international labor progress and social development. A strong thematic collectible for labor, industry, and international organization collections.