913 - Centenary of the International Conference on Chemical Nomenclature

913 - Centenario de la Conferencia Internacional de Nomenclatura Química

Owner	Manuel Briones
Country	Switzerland
Face value	90
Year	1992
State	Used
Status	Interchangeable
Category	Commemorations
Format	Landscape
Color	Multicolor
Other information	Perforated stamp
visualizations	78