Oskar Sala - Trautonium Rundfunkversuchsstelle Berlin 1930 - YouTube

https://www.youtube.com/watch?v=FrAcSxlpJgk

Oskar Sala plays as a student in 1930 on one of the first Trautonia constructed by F. Trautwein. The movie-picture at 0:07 shows: (1) Oskar Sala (sitting lef...