Stamps of Czechoslovakia, 30 Sep 1975
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postage
1975, Sep 30 Co-operation in Space Research issue unwmk (5 stamps)
| X | 30h | multi | p. 11.75x11.5 | |||
| - | 60h | multi | p. 11.75x11.5 | |||
| - | 1kc | multi | p. 11.75x11.5 | |||
| - | 2kc | multi | p. 11.75x11.5 | |||
| - | 5kc | multi |
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