SCG8629 - Poland 1968 – “Proletariat Members” by Feliks Kowarski (V Congress of the Polish United Workers’ Party)Issued by Poland in 1968, this 60 groszy commemorative stamp honors the V Congress of the Polish United Workers Party (PZPR). The design reproduces Proletariatczycy (Proletariat Members), a painting by Feliks Kowarski, depicting key members of the 19th century socialist movement. The artwork symbolizes unity and labor solidarity, reflecting the ideological spirit of postwar socialist Poland. The deep red and brown hues reinforce the proletarian theme,