This customized horn is made of parts from Bach, Schilke, and Instrument Innovations. The bell is a Bach 42 that was sitting around the Kanstul factory for years (probably purchased for R&D). The valve is the infinity valve (Instrument Innovations) that Bach is using for thejr 42AF. The slide is a Schilke large bore slide with a removable Bach 42 leadpipe. This receiver will take Getzen made leadpipes also. There are some very minor cosmetic issues that you will find if you look really closely, but otherwise this is basically a new horn. Cool fact... The valve's serial number is 0001!
Bach 42AF/Schilke ST20 Hybrid