• Country
• Switzerland

• Manufacturer / Brand
• Bell Standard Telephon & Radio AG (STR), Telephone Manufacturing Co,; Zürich, Bern etc.

• Year
• 1930/1931

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 11446

• Main principle
• TRF without regeneration

• Loudspeaker
• - For headphones or amp.

• from Radiomuseum.org
• Model: Tefadyn - Bell Standard Telephon & Radio

• Notes

• Inserat in «Le Radio» [3331420]

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

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Other Models

• Here you find 11 models, 5 with images and 6 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Bell Standard Telephon & Radio AG (STR), Telephone Manufacturing Co,; Zürich, Bern etc.