• Country
• United States of America (USA)

• Manufacturer / Brand
• Union Construction Co. (Master?); Oakland, California

• Year
• 1923

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 63916

• Number of Tubes
• 3

• Valves / Tubes

• Main principle
• Crystal or Solid State Detector with Amplifer

• from Radiomuseum.org
• Model: 3 tubes - Union Construction Co. Master?

• Notes
• 5 dials (primary tuning control knobs)

• External source of data
• Ernst Erb

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

• Other Models

• Here you find 2 models, 2 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Union Construction Co. (Master?); Oakland, California