No insulators, but I thought this was a great illustration of how things used to happen. As quoted from the book Toronto, The Place of Meeting : "Illuminating Toronto required much man and horse power. Here over 20 linemen labour to sink one of the 60' power poles on Mutual Street in July 1910. AO S17362 " Now it takes about 4 men, 2 trucks and a morning to get a several poles changed out. Good collecting ............. Robin