• Country
• Germany

• Manufacturer / Brand
• Grawor, Rundf.techn.Erz. Grass & Worff (REG); Berlin

• Year
• 1925–1927

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 72941

• • alternative name: Gravor

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• Horn / Ø 35.5 cm = 14 inch

• Material
• Metal case

• from Radiomuseum.org
• Model: Hallophon 1925 - Grawor, Rundf.techn.Erz. Grass

• Price in first year of sale
• 35.00 Mk

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Mentioned in
• Katalog Radio-Bauer 1927

• Author
• Model page created by Wolfgang Eckardt. See "Data change" for further contributors.

• Other Models

• Here you find 141 models, 136 with images and 3 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Grawor, Rundf.techn.Erz. Grass & Worff (REG); Berlin