For your consideration this is a rare old french cornopean made around 1840/1850.
It's raw brass with some onemental pieces in german silver, luxuary model! Unstamped but probably made by GUICHARD in Paris.
Not playable condition, need a full restoration. 
Valves and slides move but there are a lot of bumps and restore traces.
Sold as is, with mouthpiece and crook but no case.
More details and pics on ask.
Have a nice day!