Knoth, F tuba, 6 rotary, c.1960 Tag #: 01649 Serial #: Bell Diameter Bore Size Height 14 7/8″ .670″,1,5,6; .710″, 2-4 39.0″ Comments: “Meister/ Kurt Knoth / Markneukirchen / Sinfonia” on bell. There is also a small triangle below the identification with illegible writing in it. Share this:TwitterFacebookLike Loading...