This is a New Old Stock, right off the shelf.

It is a Lunkenheimer 2-inch bell diameter single note, without valve steam whistle with a ½-inch npt inlet. It is new from the Lunkenheimer Co. This whistle is desirable for use on the Lunkenheimer No. 1, 3-whistle manifold, or similar plumbed manifold or as a single whistle. It would make a wonderful presentation piece for display or special occasion.