I had posted this finding a long while back but was hoping that there would be more research done and maybe an article written. I don't have the proper camera and other to present a proper printable article but here goes. There is a porcelain mine insulator with the marking Elreco Cin Ti O on it. I have this mine insulator plus a feeder spool with a different marking. This marking is the trade name for The Electric Railway Equipment Co. Cinncinatti Ohio. They have been in buissness since the early teens and practically copied or were in league with Ohio Brass Co's trolly line equipment. They also had items jobbed through the Cooke Wilson Co. and Mine and Smelter Co. Here is a picture of a U-94 and a feeder insulator spool made for them. These are the same as Ohio Brass Co. ones. Elreco was in buisness at least into the late 60's.