• Country
• Germany

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

• Year
• 1927–1930

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 14885

• • alternative name: Gravor

• Power type and voltage
• No Power needed

• Loudspeaker
• Magnetic loudspeaker (reed) of high quality (4 magnet poles). / Ø 30 cm = 11.8 inch

• Material
• Various materials

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

• Dimensions (WHD)
• 300 x 250 x 180 mm / 11.8 x 9.8 x 7.1 inch

• Notes
• Konus-LS, offen, rund

• Price in first year of sale
• 21.00 RM

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

• Source of data
• Katalog Radio-Zentrale Prohaska 1928 / Radiokatalog Band 2, Ernst Erb

• Mentioned in
• Arlt's grosser Radiokatalog 1930

• 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