When I was into fighting knifes I looked in to these a bit..
Waffen - Loesche in Berln was just a retailer and the majority were just marked such,,but there are others with the actual maker on them..
The copies have been seen here in the US since the 1970s..
Here's a great topic with some nice views!
http://phpstack-500133-1583587.cloudwaysapps.com/ubbthreads.php?ubb=showflat&Number=34820*+