Antoine Courtois 140 valve trombone

[Ibicus]

Hello! I am trying to find information on Antoine Courtois Paris 140 valve trombone, the serial is 96xxx.
On the bell, it just says Antoine Courtois Paris and 140 stamped on the side of the bell.
Most Courtois bones I saw have round bell weight with the logo, but this one does not.
Most likely it was made in the mid-1990s.
I am trying to find out whether it is a professional model or a student horn. The bell looks practically identical to Courtois 150, I guess it is the same series.
Any information provided will be greatly appreciated!