ITE 6 inch cobalt, almost black, porcelain suspension with clevis.ITE marked on the skirt of this almost black 6 inch porcelain suspension with Victor marked BTC clevis cap. .The Victor Insulator Company based in Victor, N.Y. (founded 1898 by Fred M. Locke) originaly made glass insulators for electrical lines . The Victor Insulator Company, was in business from 1935 to 1953. The I-T-E Imperial Corporation bought out Victor Insulators Inc. in 1953 ... Marking(s) --- incised on skirt in stylized circular lettering I-T-E. There were several owners up until 1984 when the employees bought the company.

BTC is Brewer-Titchener Corp they were a hardware provider for many companies