• Country
• United States of America (USA)

• Manufacturer / Brand
• Howard Radio Company; Chicago (IL)

• Year
• 1937/1938

• Category
• Radio module post 1925 (not a part, not a key)

• Radiomuseum.org ID
• 44480

• from Radiomuseum.org
• Model: 211 Push-Button Adapter - Howard Radio Company; Chicago

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 10 = 1939 and before

• Mentioned in
• Radio Today (and Television) (November 1937, page 23.)

• Other Models

• Here you find 354 models, 152 with images and 214 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Howard Radio Company; Chicago (IL)