Once again i had a nice (email) conversation with one of my idols, trombone artist Bertl Mütter.
Thanks for that!
The picture shows him with his Schagerl trombone and bass trumpet.
The trombone is the Muthorn 1.0, which Schagerl made for Mr. Mütter in 2009, currently he´s playing the Muthorn 2.0 from 2013.
© http://www.muetter.at, Photo: Christof Zachl