• Country
• United States of America (USA)

• Manufacturer / Brand
• Industrial Instrument Service Corporation; Chicago

• Year
• 1951 ??

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 97715

• Wave bands
• - without

• Power type and voltage
• Line / Batteries (any type)

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Vacuum Tube Voltmeter 504 - Industrial Instrument Service

• Shape
• Portable set > 8 inch (also usable without mains)

• Dimensions (WHD)
• 6.75 x 10.2 x 5.5 inch / 171 x 259 x 140 mm

• Notes
• 6 ranges to 1000 megohms.

• Price in first year of sale
• 38.00 $

• Literature/Schematics (1)
• 1951 Newark catalog Nº 51

• Author
• Model page created by Vitor Oliveira. See "Data change" for further contributors.

• Other Models

• Here you find 8 models, 8 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Industrial Instrument Service Corporation; Chicago