37771 United Nations first day covers 1951-2009.

Lifework of a collector, not only the first day covers from the earlies onwards with all kinds of different cachets, also last day covers, maximumcards from 1951 onwards (try to find these anywhere), great collection with varieties (many missing colors of the cachets, missing relief etc. Rare material!!), furher all kinds of special issues, bisects on first day cover etc. etc. housed in a large amount of albums, in 13(!!!) big boxes. Unique opportunity, the biggest collection of this nice material you will find on the web!!