One of the most interesting things for me was the Stoessel-laute , as a friend (Peter Sailer) in our local (Wash DC) folk society plays the standard 'folk' version.

See here and here

as he explains it, the Steussel/Stoessel was banned by the Nazis as something not in keeping with the philosophies of the party, and thus many were destroyed. I had not heard of the 'lute' version until I found this site.