El Salvador
Ora in esposizione: El Salvador - Francobolli postali (1867 - 2020) - 2 francobolli.
1979
The 5th Latin-American Clinical Biochemistry Congress, San Salvador
1. Novembre WM: Nessuno Dentellatura: 14½ x 14
![[The 5th Latin-American Clinical Biochemistry Congress, San Salvador, Scrivi QZ]](https://swmedia-4cd6.kxcdn.com/media/catalogue/El-Salvador/Postage-stamps/QZ-s.jpg)
1979
Airmail - The 5th Latin-American Clinical Biochemistry Congress, San Salvador
1. Novembre WM: Nessuno Dentellatura: 14½ x 14
![[Airmail - The 5th Latin-American Clinical Biochemistry Congress, San Salvador, Scrivi QZ1]](https://swmedia-4cd6.kxcdn.com/media/catalogue/El-Salvador/Postage-stamps/QZ1-s.jpg)
