The Model # Listed on that schematic of yours is not the same as the Model # you Posted. Also the Number on the Schematic is hard to read. What is stamped on the T Eaton’s, name tag? Where did you download the Schematic from? And there does seem to be some Trademark problems related to the use of the name “Minerva” ??? It seems that your radio was manufactured in 1938. And by the way, the Austrian Radio ndustry, as well most other most other German and Austrian industries were taken over by the Third Reich, during WWII. Apparantly Hitler also used forced slave labour, namely provided by imprisioned Jews. I hope I did not break any site rules by breaching that subject.
Ralph