Stamps, space-based observatories issue

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Poland

postage

1973, Jun 20 space-based observatories issue unwmk p. 9-14.5
Colnect-2238-447-US-space-telescope--quot-Copernicus-quot--over-earth.jpgColnect-2238-445-Soviet-test-station-Salyut-1.jpg
X 4.90z multi US Copernicus
X 4.90z multi Salyut

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