The 14th UPU Congress, Ottawa and International Correspondence Week 1957
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1957
The 14th UPU Congress, Ottawa and International Correspondence Week
10. Oktober Wz: Keine Design: Imprenta nacional de Austria Gravieren: Mosdóssy Zähnung: 12
![[The 14th UPU Congress, Ottawa and International Correspondence Week, Typ XXG]](https://www.stampworld.com/media/catalogue/Colombia/Postage-stamps/XXG-s.jpg)
![[The 14th UPU Congress, Ottawa and International Correspondence Week, Typ XXG1]](https://www.stampworld.com/media/catalogue/Colombia/Postage-stamps/XXG1-s.jpg)
