• Country
• Germany

• Manufacturer / Brand
• Ehrich & Graetz AG; Graetz Radio GmbH; Berlin

• Year
• 1927 ?

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 14296

• • Brand: Telwerk

• Power type and voltage
• No Power needed

• Loudspeaker
• -Loudspeaker incorporated, but system not known.

• from Radiomuseum.org
• Model: Konus-Lautsprecher - Ehrich & Graetz AG; Graetz

• Notes
• Porzellangehäuse, rund; Membran Pertinax!

• External source of data
• E. Erb 3-907007-36-0

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Picture reference
• Das Gerät ist im Doppelband "Historische Radios" von Günther Abele abgebildet.

• Other Models

• Here you find 6 models, 2 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Ehrich & Graetz AG; Graetz Radio GmbH; Berlin