Adriaan "Aat" de Peijper (died 1998)Jan Kas, Kostbare postzegel met Nijkerkse stempel geveild voor 16.000 euro, Reformatorisch Dagblad, 28 April 2004. was a Dutch industrialist and philatelist whose collection of Dutch, Dutch colonial, and British Commonwealth stamps included several world rarities.
Career Until 1987 De Peijper was director of a pharmaceutical distribution company in Etten-Leur. De Peijper and his company Centrafarm won a number of court battles concerning their redistribution of medicines within the EU,Weer kort geding tegen geneesmiddelenimporteur, Nieuwe Leidsche Courant, 26 August 1976. including some against Sterling Drug / Winthrop that are considered landmark cases.Floris O.W. Vogelaar, The EU Competition Rules: Landmark Cases of the EU Courts and the European Commission, pp. 17-19Landmark Decision by EC Court
Philately De Peijper began collecting stamps from a young age but according to his wife Mrs M.W. de Peijper-Pieksma, it was not until later in life that he was able to afford the more expensive items missing from his collection. He bought many items from the Samos collection, and also items formerly in the Boker, Burrus, Casapry, and Dale-Lichtenstein collections.The Collection Aat de Peijper. De Nederlandsche Postzegelveiling, Amsterdam, 2013. pp. 4-5.
His collection was principally of the stamps of the Netherlands, with a focus on the first issue,Auction catalogue Netherlands collection Aat de Peijper, part II the British Commonwealth and Dutch colonies. Among the rarities in the collection was a 1925 Kenya and Uganda £100 (SG105) unused plate number postage stamp (signed A. Diena in the margin),The Collection Aat de Peijper, p. 37. one of four unused copies known in private collections and museums.Nieuwsbrief, KNBF, Vol. 4, No. 43, 15 November 2013, p. 8. Another rare item was a 1925 unused Ceylon 1000R (SG323) plate number single with a certificate by Friedl.The Collection Aat de Peijper, p. 21. Both were formerly in the Samos collection. The de Peijper collection was auctioned by De Nederlandsche Postzegelveiling in 2013, with the £100 Kenya and Uganda stamp reckoned to be the most valuable stamp ever to be auctioned in the Netherlands.Rare British Commonwealth Stamp to Be Auctioned at Dutch Auction House NPV. Reuters, 25 October 2013. Retrieved 26 March 2016.Duurste postzegel ooit in Nederland geveild. deVerdieping Trouw, 24 October 2013. Retrieved 26 March 2016.
Stamps of the de Peijper collection
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