The Fourth Plenary Assembly of the International Telegraph and Telephone Consultative Committee, Mar del Plata 1968
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1968
The Fourth Plenary Assembly of the International Telegraph and Telephone Consultative Committee, Mar del Plata
19. October WM: 9 Perforation: 13½
![[The Fourth Plenary Assembly of the International Telegraph and Telephone Consultative Committee, Mar del Plata, type ZY]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Argentina/Postage-stamps/ZY-s.jpg)
![[The Fourth Plenary Assembly of the International Telegraph and Telephone Consultative Committee, Mar del Plata, type ZZ]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Argentina/Postage-stamps/ZZ-s.jpg)
![[The Fourth Plenary Assembly of the International Telegraph and Telephone Consultative Committee, Mar del Plata, type AAA]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Argentina/Postage-stamps/AAA-s.jpg)
