philatelist
Philately (; ) is the study of postage stamps and postal history. It also refers to the collection and appreciation of stamps and other philatelic products. Philately involves more than just stamp collecting or the study of postage; it is possi ...
who, in 2014, was invited to sign the
Roll of Distinguished Philatelists
The Roll of Distinguished Philatelists (RDP) is a Philately, philatelic award of international scale, created by the Philatelic Congress of Great Britain in 1921. The Roll consists of five pieces of parchment to which the signatories add their n ...
. He was awarded the Sieger Medal in 2003 and 2008 and the
Lindenberg Medal
The Lindenberg Medal is an award given to those who provide “conspicuous service to philately” because of their investigations and contributions to philatelic literature.
It is considered by some as the Nobel Prize of Philately.Horst Hille: ' ...
in 2012. Maassen is a specialist in the philately of Brazil and a student of the history of philately and
philatelic literature
Philatelic literature is written material relating to philately, primarily information about postage stamps and postal history.
Background to philatelic literature
Philatelic literature is held by stamp collectors and dealers, philatelic soci ...
."New signatories to the Roll of Distinguished Philatelists" by Jane Moubray in ''
The London Philatelist
''The London Philatelist'' was first published in January 1892 by
philately
Philately (; ) is the study of postage stamps and postal history. It also refers to the collection and appreciation of stamps and other philatelic products. Philately involves more than just stamp collecting or the study of postage; it is poss ...
, a philatelic journalist and publisher. His own philatelic library, with hundreds of metres of shelf space, is one of the biggest in private hands. Furthermore, he is Editor in Chief of the German magazine ''philatelie'' and the international magazine ''Phila Historica''. He is also President of the AIJP, the world association of authors and journalists in philately.