Centenary of the death of Hermann von Helmholtz (physicist).

Centenario de la muerte de Hermann von Helmholtz (físico).
OwnerNemesio Ramirez Lemos
CountryGermany
Colection
Face value100pf.
Measures44x26mm.
Year1994
StateUsed
StatusExhibition - Non-transferable
CategoryCommemorations
FormatLandscape
Colorvarios.
Other informationPerforated stamp
visualizations200