It's a dehorning saw . I have several. see Sellens' Dictionary of American Hand Tools page 402.
Yup Sure 'nuff
But they work just dandy for other jobs too.
Cut up bandsaw blades for them. You can cut up metal cutting or wood cutting bandsaw blades either one.
I keep a coarse 14tpi on mine, and use it on heavy soft metal like brass etc.
Eats though a thick block of brass or copper, pretty quick.
yours Scott