1919 Conn valve alto trombone!

[@ariadnetorres3014]

Hey that sounds amazing
Do you happen to have the position chart?

[@PosauneundPapier]

Great sound

[@kn-qz7by]

I like the sound!

[@SamTheTriangleTrains]

Neat.

[@sceu25]

Sounds similar to a mellophone

[@cameronhizer3767]

What key is this in? Bb?

[@mr.starfish4965]

Most likely E-flat