This is a copperweld conductor with steel twist around wire. Tie wire is also copperweld and is wrapped twice around the groove, then twisted together rather than around conductor. This insulator is an obvious replacement, as the rest of the line was Hemingray 9s and the like. The tie wire was obviously untwisted then reused. This was found along a stretch of nine old side pin poles that ran from an interface with an underground phone cable. The line dead ended at a 90 degree pole, but unfortunately did not any longer continue past that pole.