40th anniversary of the Polish Workers' Party.
PPR (Polska Partia Robotnicza) = Polish Workers' Party.
40 rocznica powstania PPR (Polskiego Partii Robotniczej) - Partii walki o wyzwolenie narodowe i społeczne = 40th anniversary of the Polish Workers' Party - the Party of fight for national and social liberation.
Find other Polish stamps commemorating meetings and anniversaries of the PPR
Polish Workers' Party
13.XII.1981 - Wojska WRON (Wojskowa Rada Ocalenia Narodowego) z narodem = 13 December 1981 - The war of the WRON (the Military Council for National Salvation) with the nation.
Martial law in Poland
Military Council of National Salvation
FDC Fischer 2644