Dynamo-Prinzip (Werner von Siemens)
Stamp: "Dynamo-Prinzip (Werner von Siemens)"
| Printed value | 30 Pfennige  |
Motif, Topic | Technics |
| Circulation | 30.000.000 | Valid until | December, 31 - 1968 |
| Published | September, 28 - 1966 | Design | Karl Oskar Blase |
Description
Fortschritt in Technik und Wissenschaft