This stamp commemorates the death of Mendeleev (February 1907), one of the lead figures responsible for the periodic table. Absolutely excellent choice of colours if I might say so!
The stamp was sent to me by Prof Gabriel Pinto (Departamento de Ingeniería Química Industrial, ETSI Industriales, UPM, Madrid, Spain) and I quote from his web page: “This stamp was launched on february 2, 2007, by Correos (Spanish Post Office).
WebElements February 2nd, 2007
Posted In: Chemistry