A striking two-stamp set issued by Yugoslavia in 1957 to commemorate the Kongres Radničkih Saveta (Congress of Workers’ Councils).
Both designs feature a symbolic hand supporting an industrial complex—an iconic socialist-era motif representing worker stewardship over production.
The 15 para carmine and 30 para blue values highlight strong line-engraved shading and bold typography reflecting mid-century Yugoslav graphic style.
Highly collectible for themes of labor movements, socialist industry, and post-war Yugoslav history.
A well-preserved and visually powerful duo from the formative years of self-management socialism.