I came across a valve trombone that I consider getting: F. Besson Paris Brevete SGDG Meha,

I searched all over the net, but there is absolutely no information about this horn! I know that trumpets with the same markings are considered being quite reputable, wondering if the same goes for trombones.

It is silver plated and full bell ingraving reads:

F. Besson Paris Brevete SGDG Meha

66 Hautes Recompenses 6 Grands Prix

Hors Concours

Membre Du Jury made in France.

Here is the photo of the bell:

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And the seller says that there is no serial #!

Any information about this horn will be greatly appreciated!