International Year of Chemistry 2011
Now showing: Paraguay - Postage stamps - 2011 - International Year of Chemistry - 1 stamps.
2011
International Year of Chemistry
9. May WM: None Engraving: Departamento de Valores Fiscales, Asunción. Perforation: 13
![[International Year of Chemistry, type ETT]](https://www.stampworld.com/media/catalogue/Paraguay/Postage-stamps/ETT-s.jpg)