• Country
• United States of America (USA)

• Manufacturer / Brand
• Clapp-Eastham Co.; Cambridge, MA

• Year
• 1917

• Category
• Radio part (not a module) 

• Radiomuseum.org ID
• 213321

• • Brand: Radak

• Power type and voltage
• Dry Batteries

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: High Frequency Buzzer - Clapp-Eastham Co.; Cambridge,

• Notes
• From 1917 "Radio and Laboratory Apparatus Catalog X", Clapp-Eastham-Company, 139 Main Street, Cambridge, Massachusetts: High Frequency Buzzer. The slogan for Blitzen brand was "A little better than the best".

• Author
• Model page created by Ernst Erb. See "Data change" for further contributors.

• Other Models

• Here you find 130 models, 107 with images and 3 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Clapp-Eastham Co.; Cambridge, MA