Posted by Craig on March 13, 2000 at 12:41:28:
In Reply to: Conn Sousaphones posted by ronr on March 12, 2000 at 23:55:03:
There should be a model number engraved at the base of the bell and on the body where the bell attaches. Also, if it has the short action, offset valves (the valve stem is not centered in the cap) it is a 20K. The model number really doesn't matter as long as you like the way it plays.