Couesnon (1897)

This is a Cornet made by Couesnon & Cie. in 1897. While most of the instrument looks brand new, the bell is warped and the spring for the water key is broken.
I suspect someone had it (chemically) cleaned (even the valves look like new), but why they did not address the warped bell and the broken water key is a mystery to me.
With the water key jammed in closed position (I jammed the hinge with the top of a Q-tip), the cornet is playable.