• Country
• United States of America (USA)

• Manufacturer / Brand
• United Metal Stamping and Radio Co.; Cincinnati OH

• Year
• 1924

• Category
• Detector-Radio (Crystal or diode, without tubes/transistors)

• Radiomuseum.org ID
• 64196

• Main principle
• Crystal or Solid State Detector

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• No Power needed

• Loudspeaker
• - For headphones or amp.

• from Radiomuseum.org
• Model: Diamond - United Metal Stamping and

• Notes
• Similar to Mengel MR 101 and also to Shamrock Radiophone "Crystal" Model A.

• Price in first year of sale
• 4.00 $

• External source of data
• Ernst Erb

• Source of data
• Radio Collector`s Guide 1921-1932

• Mentioned in
• Crystal Clear (Volume 1)

• Other Models

• Here you find 13 models, 2 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from United Metal Stamping and Radio Co.; Cincinnati OH