CD 1055: Australia
3 1/2" X 2 7/8" (89mm X 73)
(front top ring) A.G.M. L.T.O.1 (rear top ring) 51
Picture courtesy Don Mecklenborg |
This is a spool insulator which is unthreaded and mounts in a holder with a pin through the center. These were typically used to dead-end a power or communication line.
Original CD assignment from Glass Insulators From Outside North America published in 1993 by Marilyn Albers & N.R. Woodward.