Telephone line testing device by Stewart Brothers, Division of Instrument Laboratories, Chicago. The oak box contains two wire clamps that attach to the line, an ear piece, and a hand crank for power. It has a leather strap attached.
Use
Used by lineman for checking and repairing telephone lines.
Made/Created
Manufacturer
Stewart Brothers
Place
City
Chicago, Cook County, Illinois
County
County - Cook
State/Province
Illinois
Country
United States
Continent
North America
Inscription/Signature/Marks
Type
Plate
Location
Left side of box
Transcription
Stewart Brothers, Div. of Instrument Laboratories, Chicago 10, Illinois, Serial No. 755, Model No. H
