Antique glass insulator whitetail number 1

You may have noticed glass insulators such as this one atop railroad poles. During the era when telegraphs were a primary method of communication, these glass insulators kept the wires from coming into direct contact with the poles, helping to insulate the signal. A great add to your insulator collection! Stamped Whitetail no 1 MADE IN USA Great condition! Minor wear on the inside (see images)