This 80 stotinki commemorative stamp from Bulgaria was issued in 1961 to celebrate the 50th anniversary of the Transport and Communications Workers’ Union (1911–1961). The design features a symbolic composition of a radio transmission tower, an anchor, wings, and a cogwheel—representing communication, maritime, aviation, and industrial transport. The modernist green and white layout reflects Bulgaria’s socialist-era style, honoring workers’ contributions to infrastructure and communication progress. A meaningful piece for collectors of labor, industry, and thematic transport stamps.