Markneukirchen Brass Factory Tour | Hans Hoyer
4:21
Markus Wittgens | Hans Hoyer
3:46
Markneukirchen Brass Factory Tour | B&S
4:21
Testing K10 Horns with Markus Wittgens | Hans Hoyer
31:23
Conn 8D and Hans Hoyer 6801 Shootout
5:20
Geretsried Workshop Tour | Hans Hoyer
3:44
Jupiter Factory Tour English
4:11
Michael Rath Trombones Factory Tour
8:38