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Source:
Colnect
Issued by:
Portugal
Function:
postage
Date:
9/24
/
1971
Issue:
Economic Geology Congress
Denom:
6.50e
Color:
multicolored
Design type:
minerals
(1971 Portugal)
Design:
chalcopyrite
(1971)
Watermark:
unwmk
Perf:
12
Catalog value:
In collections: some private
Prev:
3.50e d=beryllium
Next:
10/7/1971 1e issue=Castelo Branco 200th d=Castelo Branco town gate perf=14.5
External links:
Colnect 64194-..onomic_Geology
Record of changes