Here's an old "Steam Whistle", probably from an old "Shay".....been in the family for over an hundred years........my "Grandad", a RR Engineer on Steam Engines, probably held the record (or close) for the longest train of "coal" that was pulled up the "Greenbrier River" in West Virginia, had this in his tool shed before I was born.....I latched on to it, when I became old enough to know I wanted something to remember him by.....haven't seen this same whistle on an engine, and I am constantly looking.....the next to last photo, from TV, shows what it would look like in use....the last photo I took during my "College" days....there's two steam engines in the photo......one coming toward you on the left and one going away on the right.....