One Brand ― One Team ― One Goal
C.G. Collectors World

Auktionshaus Christoph Gärtner GmbH & Co. KG
Meeting Place for Collectors, Dealers, and Investors from All over the World

Christoph Gärtner GmbH
Consulting, Liaising, Purchase and Sale

Kompetenz-Zentrum West Auktionshaus Christoph Gärtner GmbH & Co. KG
The regional base in North Rhine-Westphalia

Auction Galleries Hamburg vormals Schwanke GmbH
The Specialists in Postal History, Classic Rarities, and Literature

Edgar Mohrmann & Co. Internationale Briefmarkenauktionen GmbH
The Traditional House in Hamburg