Piston F horn
This is a pre-1930s piston horn, serial number dates it to between 1925 and 1930.
Could be used for historic performances of early 20thC French and British works or orchestral repertoire; or maybe just to add a bit more interest to your practice regime. This one has been used for school demonstrations too! (Such a plethora of uses!)
This horn comes with one crook (unlikely to be original) and a case, which is also not original but is old!