Posted by Matt Walters on December 19, 2001 at 14:39:18:
In Reply to: What model is my tuba? posted by Jim H. on December 19, 2001 at 14:19:17:
Jim,
You have either a Model 30 (.768" bore and the main tuning slide goes sideways.) or a William Bell Model 35 (.690 bore and the main tuning slide goes up and down.)