• Country
• Germany

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

• Year
• 1928/1929

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 74148

• Loudspeaker
• Magnetic loudspeaker (reed) generic. / Ø 35 cm = 13.8 inch

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

• Shape
• Miscellaneous shapes - described under notes.

• Dimensions (WHD)
• 0 x 400 x 0 mm / 0 x 15.7 x 0 inch

• Notes
• magnetischer Lautsprecher im runden Gehäuse mit Standfuss.

• Price in first year of sale
• 21.00 RM

• Source of data
• Radio-Diehr, Berlin, 1928/1929 / Radiokatalog Band 2, Ernst Erb

• Author
• Model page created by Michael Seiffert. 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