100 Years of Harz Mining - Zinc Sulfide (ZnS), Galena (PbS).

100 Años de Minería de Harz- Sulfuro de Cinc (ZnS), Galena (PbS).
OwnerHerman Cudris Castañeda
ObservationsStamps issued in 1968 and expiration in 1970 - Michel:DE 547 - Stamp Number:DE 979 - Yvert et Tellier:DE 412 - Stanley Gibbons:DE 1452 - AFA:DE 1511
CountryGermany
Face value20 pfennig
Year1968
StateUsed
StatusExhibition - Non-transferable
CategoryScience
FormatVertical
Colorverde esmeralda.
Other informationPerforated stamp Air mail
visualizations128