MMB Internationale Münzen-, Mineralien- und Briefmarkenbörse Friedrichshafen
https://www.mmb-fn.de!!!It seems that can be only related to coin and stamps, minerals anymore. Need to check further!!!
14 june 2020
NEW LOCATION for 50° EDITION:
Graf-Zeppelin-Haus
Olga Street 20, 88045 Friedrichshafen, Baden-Württemberg, Germany
Messe Friedrichshafen GmbH, Neue Messe 1
88046 Friedrichshafen, Baden-Württemberg, Germany