Potsdam Meteorological Observatory 75th issue of German Democratic Republic
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Short desc: Potsdam Meteorological Observatory 75th
Issuer: German Democratic Republic Date: 1/24/1968 Occasion: Potsdam Meteorological Observatory opening Number/Year: 75 Consists of 3 stamps: (See stamps as list) 10pf d=Aktinometer 20pf d=map with cloud formations 25pf |
