• Country
• United States of America (USA)

• Manufacturer / Brand
• Reliance Rubber Company, The; Chicago, Illinois

• Year
• 1922

• Category
• Radio part (not a module) 

• Radiomuseum.org ID
• 260457

• Main principle
• Tuner pre 1926 (not a wave trap)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Special material, described in the notes.

• from Radiomuseum.org
• Model: Variometer - Reliance Rubber Company, The;

• Notes

• Moulded hard rubber construction with green wire. 

• Literature/Schematics (2)
• July-August 1922, Radio Age magazine advertisement page 32

• Author
• Model page created by Alan Larsen. See "Data change" for further contributors.

• Other Models

• Here you find 3 models, 3 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Reliance Rubber Company, The; Chicago, Illinois