N-TBD: United States (USA)
3 1/8" X 5 7/8" (79mm X 149mm)
(casting embossed)
Picture courtesy Bob Berry |
3 1/8" X 5 3/4" (79mm X 146mm)
(upper skirt) ANDERSON / BOSTON PAT / JUNE 16, 04 (around pin hole) A & J M ANDERSON BOSTON MASS
Picture courtesy Matt Grayson |
3 1/8" X 5 3/4" (79mm X 146mm)
(around pin hole) "illegible" INSULATION
Picture courtesy Matt Grayson |
This is a feeder cable insulator made with cast iron or brass over a composition base and a brass screw cap.