Posted by K on February 13, 2004 at 18:05:07:
In Reply to: .625" bore rotor & casing... posted by on February 13, 2004 at 17:36:39:
This would have to come from some very rare birds: one of the few German rotor Kaiserbaritone models with increasing bore through all of the rotors.
I seem to remember one or two Miraphone models having 4th valves close to this bore. The one linked to even overshoots with 0.013"
Klaus