This is a nice piece of history. A Kruspe single F with rotary valves and clock-spring valve mechanisms.
Unlacquered, with an engraved garland, this is a rather nice looking instrument. As it has been so loved in the many years since its manufacture years, the valves are a little low on pressure. That said, some oil that is thicker than you would used on a modern horn will help get the best out of this one. In any case, it will look lovely hanging on your wall with the rest of your horn collection!