Stamps Category Science

Molecular Symbol of the Methyl Radical
Hector Mario Camargo Pulido
Exchange 0.20 usd 20 cents.
Francisco Javier Jiménez Frías
Symbol of the atom and Olive Branch
Hector Mario Camargo Pulido
Retort, Pulley and Burner
Hector Mario Camargo Pulido
International Year of Planet Earth
Jose Roberto Lara
1498-Archimedes
Jorge Nadal
Exchange 0.75 usd 50 cents.
Francisco Javier Jiménez Frías
Exchange 0.75 usd 50 cents.
Francisco Javier Jiménez Frías
Computer. Key to progress
Francisco Minguez
Modern technology in agriculture. Fertilizer spreader
Francisco Minguez