• Country
• Germany

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

• Year
• 1928–1930

• Category
• Sound/Video Recorder and/or Player

• Radiomuseum.org ID
• 14888

• • alternative name: Gravor

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Details
• Rec.Player+Audio.Amp+LS

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

• Material
• Wooden case

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

• Shape
• Console with any shape - in general

• Notes
•  

• Price in first year of sale
• 2,100.00 RM

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

• Source of data
• Radio Schnorr 1929 / Radiokatalog Band 2, Ernst Erb

• 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