Stamp in honour of the 7th Congress of the Socialist Unity Party, German Democratic Republic, 1967 -- Daily LIFT #1332
From the Great Soviet Encyclopedia, 1979:
The Seventh Congress of the SED, which met in April 1967, specified the tasks of building a developed socialist society in the GDR. Since two sovereign states with different social systems—the GDR and the Federal Republic of Germany (FRG)—had come into existence in what was once Germany, the congress stressed that relations between the GDR and FRG should be conducted on the basis of equality, the accepted norms of international law, and the principles of peaceful coexistence.
For the full GSE article on the SED see: Socialist Unity Party of Germany formed April 21, 1946 (theleftchapter.com)
This historic image is available on 2 kinds of mug at our Etsy store:
Mug with accent colours: https://daughtersoftheempire.etsy.com/listing/1723813721