Stamps of German Democratic Republic, 7 Jun 1957
1 to 3 of 3
postage
1957, Jun 7 German scientists (no wmk info) (no perf info)
| X | 5pf | olbrn | Joachim Jungius in oval | |||
| X | 10pf | dpgrn | Leonhard Euler in oval | |||
| X | 20pf | brnred | Heinrich Hertz in oval |
1 to 3 of 3