The 8th Central-American Pharmaceutical and Biochemical Congress - Issues of 1966 Overprinted "VIII CONGRESO CENTROAMERICANO, etc" 1967
กำลังแสดง เอลซัลวาดอร์ - แสตมป์ไปรษณียากร - 1967 - The 8th Central-American Pharmaceutical and Biochemical Congress - Issues of 1966 Overprinted "VIII CONGRESO CENTROAMERICANO, etc" - 2 แสตมป์.
![[The 8th Central-American Pharmaceutical and Biochemical Congress - Issues of 1966 Overprinted "VIII CONGRESO CENTROAMERICANO, etc", ประเภท JJ2]](https://www.stampworld.com/media/catalogue/El-Salvador/Postage-stamps/JJ2-s.jpg)
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