• Country
• Switzerland

• Manufacturer / Brand
• Deso, Dewald & Sohn, Dewald AG; Zürich

• Year
• 1952–1954

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 11963

• Main principle
• Superheterodyne (common); ZF/IF 470 kHz

• Wave bands
• Broadcast, Long Wave, Short Wave plus FM or UHF.

• Power type and voltage
• Line (AC, UC or DC not known)

• Loudspeaker
• Presumably Dynamic Loudspeaker (moving coil)

• from Radiomuseum.org
• Model: 531FM - Deso, Dewald & Sohn, Dewald AG

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

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Other Models

• Here you find 184 models, 115 with images and 153 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Deso, Dewald & Sohn, Dewald AG; Zürich