I contacted quite a few collectors about this portable telegraph telephone and Dennis Weber, and Denny Hackthorne were the absolute only ones who knew anything about this thing. Denny said it is a lineman's field test set. He said the one he used to use was made by Western Electric........but apparantly did not have any railroad name embossed on it. This one is embossed CB&Q RR. They apparently could wire directly into the telegraph lines to call out. They are also evidently a little uncommon. Thanks to Dennis, and Denny for all the info on this thing.