All of the bull leads I’ve seen have round balls on the ends. These are sharp, like they’re made to grab something and imbed into it. These would be a little hard on the inside of a nose. Probably make the bull real unhappy ☹️.
They have a patent date of Dec 7, xxxx cast on one hook, and what looks like a name on the other hook. A little work with a wire brush might make it more legible.
Mike