My mother bought the the whistle pictured below at a Chicago-area garage sale some 50 years ago, along with some other North Shore and Chicago, Aurora & Elgin interurban items. The woman was selling the stuff for her railfan son and said that it was off a North Shore car, but I'd like to verify that. Does anyone recognize a whistle of this sort? It's only 14" Tall with a 3-1/8" Diameter, so it would maybe seem rather small for a steam locomotive. I don't see whistles on interurban cars, but I don't know where to look. I suppose it could be a factory whistle too. It's solid brass. Shortly after we bought it, my Dad connected it to his shop air compressor. The whistle sounded great, but it quickly drained our compressor tank with just a few blasts!