Now showing: Hungary - Postage stamps - 1966 - The 20th Anniversary of UNESCO - 1 stamps.
30. May WM: None Perforation: 11½ x 12½
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![[The 20th Anniversary of UNESCO, type CBI]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Hungary/Postage-stamps/CBI-s.jpg)
