This antique telephone tester box, manufactured by Stewart Brothers in the United States before 1940, is a unique collectible item for radio, phonograph, TV, and telephone enthusiasts. The box comes with a headset and was used by linemen to test telephone lines.

The brand of this item is Stewart Brothers and it belongs to the category of Pre-1940 telephones. The country/region of manufacture is the United States. This item has been previously used and is a great addition to any collection.