1974
The 100th Anniversary of World Meteorological Organization – Issue of 1971 Overprinted “Centenario de la Organizacion Meteorologica Mundial IMO-W-MO 1973” and Surcharged


[The 100th Anniversary of World Meteorological Organization - Issue of 1971 Overprinted "Centenario de la Organizacion Meteorologica Mundial IMO-W-MO 1973" and Surcharged, type UJ]

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