Helge Roswaenge performing Lyonel in the movie "Martha" (Letze Rose) (1936, in german) based on the Flotow's opera. With Carla Splatter as Martha and Frits Kampers as Plumkett. Directed by Karl Anton, screenplay by Arthur Pohl. Sorry for the poor quality of the video but this is, in my opinion, more than "golden age", the very core of the legend of singing.