Stamps of Portugal, 24 Sep 1971

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postage

1971, Sep 24 Economic Geology Congress issue - minerals (1971 Portugal) unwmk (no perf info)
Colnect-172-353-Wolframite.jpgColnect-172-354-Arsenopyrite.jpgColnect-172-355-Beryl.jpgColnect-172-356-Chalcopyrite.jpg
- 1e multi wolframite
- 2.50e multi arsenopyrite
- 3.50e multi beryllium
X 6.50e multi chalcopyrite

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