Title:
Robert von Lieben (1873-1913): electrons amplifier tube
Country:
Austria
Denomination:
60+60 Austrian groschen
Issue Date:
1936-12-06
Color:
Violet blue
Print Method:
Recess
Perforation:
Imperforate
Watermark:
No Watermark
Dimensions:
33 x 33 mm
Emission:
Semi-Postal
Series:
Inventors
Catalog Numbers:
Mi:AT 636U,ANK:AT 636U
Date Added:
2025-10-29 14:42:30
Themes:
Famous People | Inventors | Technology | Telecommunication
Date Added:
2025-10-29 14:42:30
