Issued by Poland in 1979, this striking 1.50 zł commemorative stamp honors the Defenders of the Polish Post Office in Gdańsk, who fought heroically on 1 September 1939 during the opening moments of World War II. The design features the dramatic monument sculpted by Wincenty Kućma, rendered in bold contrasts of red, black, and grey to symbolize sacrifice and resistance. The inscription 1939–1979 marks the 40th anniversary of this defining act of Polish courage. A powerful historical-themed issue, it holds strong appeal for collectors of wartime events, memorials, and Polish history.