Posted by Rob Perelli-Minetti on August 28, 2001 at 07:54:46:
In Reply to: Bell sizes on Rain catcher Sousaphones posted by Charlie Krause on August 24, 2001 at 09:03:22:
According to an early 20's Conn catalog (of which I have a facsimile) the bell diameter on all of the raincatcher models was 22".