Stamps of Poland, 30 Apr 1994

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postage

1994, Apr 30 Inventions (1994) unwmk (no perf info)
Colnect-1494-074-Petroleum-lamp-invented-by-I-Lukasiewicz-1822-82.jpgColnect-1494-075-Astronomical-sighting-device-with-profile-of-Copernicus.jpg
- 2500z multi Petroleum lamp
- 6000z multi Astronomical sighting device

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