Issued by Austria in 1990, this striking 4.50 schilling commemorative stamp marks the centenary of International Workers’ Day (1 May 1890–1990). Designed by W. Pfeiler, it features an allegorical female figure symbolizing liberty and social progress, adorned with flowers and banners listing key social rights such as education, labor protection, and suffrage. The vivid Art Nouveau–inspired design celebrates the enduring spirit of the labor movement and Austria’s commitment to workers’ rights and democracy. A fitting tribute to both social reform and national identity.