Posted by Klaus on February 07, 2002 at 03:02:58:
In Reply to: Re: Besson F posted by Mark Carter WWW.mrtuba.com. on February 06, 2002 at 18:54:30:
Copied from the Norman page:
"Ex Demonstration Besson Sovereign F Tuba Sale
*	19" (480mm) bell, 4/4 size 
*	Full compensation System 
*	4 Front Action  piston valves,  
*	Diameter through valves No. 1-3 = .750" (19mm)
*	Diameter through valve No. 4 = .790" (20mm) 
*	Stainless steel pistons 
*	Delrin valve guides "
This does not support "They were cut down 983 EEb tubas".
According to the B&H site the 983 is a .689" bore and 17" bell instrument.
Klaus