Stamps of German Democratic Republic, 2 Jul 1975
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postage
1975, Jul 2 German Academy of Sciences 275th issue unwmk (no perf info)
| X | 10pf | multi | German dictionary of Grimm | |||
| X | 20pf | multi | Karl-Schwarzschildt-Obsrvatorium | |||
| X | 25pf | multi | electron microscope chemical plant | |||
| X | 35pf | multi | Satellite of the interuniverse series |
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