I just found this:

"Adam Schurk traded in his catalogs as Waffenfabrik in Munich, Morassiestrasse 2a.

However, he was more of a dealer than a manufacturer, buying high-quality weapons from many renowned, especially smaller, gun manufacturers in Suhl and selling them under his own name.

He also had Heeren rifles in his sales program.

He was active after the turn of the century until the 30s/40s."

Cheers,
Wolfgang

http://www.hunting-heritage.com