• Country
• Germany

• Manufacturer / Brand
• Nora, Aron, Heliowatt; Berlin

• Year
• 1930–1932

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 8055

• Loudspeaker
• Magnetic loudspeaker (reed) of high quality (4 magnet poles).

• Material
• Wooden case

• from Radiomuseum.org
• Model: Vierpol L25 - Nora, Aron, Heliowatt; Berlin

• Dimensions (WHD)
• 380 x 0 x 0 mm / 15 x 0 x 0 inch

• Net weight (2.2 lb = 1 kg)
• 3.6 kg / 7 lb 14.9 oz (7.93 lb)

• Price in first year of sale
• 60.00 RM

• Source of data
• Katalog Radio-Zentrale Prohaska 1930/31 (dick) / Radiokatalog Band 1, Ernst Erb

• Other Models

• Here you find 634 models, 557 with images and 342 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Nora, Aron, Heliowatt; Berlin