My wife and I moved into a new place last week, and while having our internet hooked up, a faint Westminster sounded off at noon. The charter guy explained to us that it was the "lunch whistle" at Certain Teed, a large plant here in Athens, and that it sounds 7 days a week, at noon on the dot. Here is today's recording of it. Between myself and a few more of us on here, we have been unable to locate it. It's definitely a Federal chime, but from what, we do not know. The plant is a good ways away. You may have to turn your speakers up:
https://www.youtube.com/watch?v=vT34V0UGxgY
Compare to this, exact same sound:
https://www.youtube.com/watch?v=tYkm6YVNlq8