• Country
• Germany

• Manufacturer / Brand
• Grassmann, Peter, RFW, Radio-Funk-Werkstätten; vor 1945, Berlin & Neuhaldensleben

• Year
• 1934

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 130490

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)

• Material
• Wooden case

• from Radiomuseum.org
• Model: Helios Permanent 42 - Grassmann, Peter, RFW, Radio-

• Shape
• Tablemodel, high profile (upright - NOT Cathedral nor decorative).

• Notes
• Grassmann Helios Permanent 42; Lautsprecher mit "Spezial-Magnet neuester Sonder-Legierung".

• Price in first year of sale
• 42.00 RM

• Source of data
• -- Original prospect or advert

• Author
• Model page created by a member from A. See "Data change" for further contributors.

• Other Models

• Here you find 111 models, 76 with images and 30 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Grassmann, Peter, RFW, Radio-Funk-Werkstätten; vor 1945, Berlin & Neuhaldensleben