This is a newly finished MM Vintage Deluxe LH Mod. It happens to be on a Martin Magna Alto, but also works just as well on any Conn, or any other vintage horn. Similar to the original MM Vintage LH Mod, it adds a tilting Bb spatula - at 45 degrees to the body - linked to the C#, and a LH articulated C# mechanism. Bb-C#-Bb slides are silky smooth. The next one will have a tilting B spatula as well.