#502 United Nations 11/09/03

This special Austrian cover was delivered by balloon post in Vienna on September 3, 2011. The cover was on board of the Nivea balloon OE-ZNI.

The special delivery took place in the course of the 22th balloon post event, which was organised by the stamp collectors club BSV Pinkafeld. The sales revenue is used to aid the St. Anna Children’s Cancer Research Institute.

The stamp is part of a set, which was issued on July 1, 2011. It commemorates the United Nations Economic and Social Council (ECOSOC).

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