The 6th Session of Socialist Countries' Post and Telecommunications Conference, Pyongyang 1988
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1988
The 6th Session of Socialist Countries' Post and Telecommunications Conference, Pyongyang
23. september WM: Geen Perforatie: 11½
![[The 6th Session of Socialist Countries' Post and Telecommunications Conference, Pyongyang, type DDU]](https://www.stampworld.com/media/catalogue/North-Korea/Postage-stamps/DDU-s.jpg)
