Noise Protection 1979
Now showing: Portugal - Postage stamps - 1979 - Noise Protection - 3 stamps.
1979
Noise Protection
14. March WM: None Design: Duarte Nuno Simões. Engraving: Imprensa Nacional Casa da Moeda. Perforation: 13½
![[Noise Protection, type ZH]](https://www.stampworld.com/media/catalogue/Portugal/Postage-stamps/ZH-s.jpg)
![[Noise Protection, type ZI]](https://www.stampworld.com/media/catalogue/Portugal/Postage-stamps/ZI-s.jpg)
![[Noise Protection, type ZJ]](https://www.stampworld.com/media/catalogue/Portugal/Postage-stamps/ZJ-s.jpg)
