Airmail - The 5th Latin-American Clinical Biochemistry Congress, San Salvador 1979
Now showing: El Salvador - Postage stamps - 1979 - Airmail - The 5th Latin-American Clinical Biochemistry Congress, San Salvador - 1 stamps.
1979
Airmail - The 5th Latin-American Clinical Biochemistry Congress, San Salvador
1. November WM: None Perforation: 14½ x 14
![[Airmail - The 5th Latin-American Clinical Biochemistry Congress, San Salvador, type QZ1]](https://www.stampworld.com/media/catalogue/El-Salvador/Postage-stamps/QZ1-s.jpg)