• Country
• Germany

• Manufacturer / Brand
• UNBEKANNTE FIRMA D / A / CH - Siehe Anleitung unter der «Firma»

• Year
• 1920 ??

• Category
• Microphone or Pick-up element

• Radiomuseum.org ID
• 212871

• • alternative name: Unknown, Custom Built

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - This model requires external speaker(s).

• Material
• Metal case

• from Radiomuseum.org
• Model: Excelsior Sound Box - Reproducer - UNBEKANNTE FIRMA D / A / CH -

• Shape
• Miscellaneous shapes - described under notes.

• Notes
• Excelsior;
  Sound Box - Reproducer. Made in Germany.
  Grammophon Schalldose.

• Author
• Model page created by a member from A. See "Data change" for further contributors.

• Other Models

• Here you find 468 models, 406 with images and 39 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from UNBEKANNTE FIRMA D / A / CH - Siehe Anleitung unter der «Firma»