It is a long shot i know, but for a future project i am seeking any & all information on the small "collectors group" within the KDF known as the:

Sondergruppe: Historische Dokumente
Abteilung: Sammeln am Feierabend.

It was a small Sammlergruppe (Special group of collectors) run by Otto Dürre in Gau Berlin.
A group where collectors of badges, awards and documents could either order or trade items that they collected.

Merci Beaucoup!