The 8th Central-American Pharmaceutical and Biochemical Congress - Issues of 1966 Overprinted "VIII CONGRESO CENTROAMERICANO, etc" 1967
Wordt nu getoond: El Salvador - Postzegels - 1967 - The 8th Central-American Pharmaceutical and Biochemical Congress - Issues of 1966 Overprinted "VIII CONGRESO CENTROAMERICANO, etc" - 2 postzegels.
![[The 8th Central-American Pharmaceutical and Biochemical Congress - Issues of 1966 Overprinted "VIII CONGRESO CENTROAMERICANO, etc", type JJ2]](https://www.stampworld.com/media/catalogue/El-Salvador/Postage-stamps/JJ2-s.jpg)
![[The 8th Central-American Pharmaceutical and Biochemical Congress - Issues of 1966 Overprinted "VIII CONGRESO CENTROAMERICANO, etc", type JJ3]](https://www.stampworld.com/media/catalogue/El-Salvador/Postage-stamps/JJ3-s.jpg)
