Herbert Todt worked and lived in Adorf, Nordstrasse 11.
He was registered as maker of plucked instruments in 1950, but became especially known as one of the very finest makers of archtop guitars. He delivered to Migma as member and also to Goldklang and others. From 1961 he changed to Sinfonia.
He had two Brothers , Siegfried and Erich, who both were guitarmakers too.
more info here : http://www.schlaggitarren.de/home.php?text=hersteller&kenn=72