COVER N.3 - United Nations - Vienna

Postmark from Wien - Vereinte Nationen, posted on the 21st May, received on the 26th.
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Third cover just in. This time not from a country, but , in a way, from a whole plectora of them. 

The United Nations Office in Vienna - UNOV - established on the 1st January 1980 is one of the four existing United Nations Headquarters, the other being located in New York, Genève and Nairobi. 

UNOV integrates the Vienna branch of the United Nations Postal Administration - UNPA - responsible for issuing stamps denominated in Euro, while the New York and Genève branches issue stamps in their local currencies, i.e., U.S. Dollars and Swiss Francs.

The stamps issued by the UNPA can only be used on mail sent from the United Nations Offices in New York, Genève or Vienna.

Thank you so much for such an interesting cover, Florian.

The stamp on the right side of the cover was issued in 2011, as part of a two stamp set (0,62€ and 0,70€), also issued in se-tenant format, on the subject of the International Year of the Forests, while the two 0,20€ stamps on the left are part of a two stamp set issued in 2010 (0,05€ and 0,20€), commemorating the International Year of Biodiversity. 

The fish depicted in the stamps is a striped cowfish (Aracan aurita), in an illustration taken from 1904's Kunstformen der Natur, by German biologist and scientific illustrator (amongst many other things) Ernst Haeckel.