Stamps of German Democratic Republic, Zeiss optical works 125th issue
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postage
1971, Nov 9 Zeiss optical works 125th issue unwmk (no perf info)
| X | 10pf | multi | Geodetic gets Dahlta 014 A | |||
| X | 20pf | multi | microscope ERGAVAL | |||
| X | 25pf | multi | planetarium |
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