Buffet Jazz Festival

Serial Number if  33319x  puts this at approximately

BARREL

The Barrel is very interesting.  The top of the barrels bore is 16.22mm - .639" and the bottom is 15.09mm - .5945"  with the bore being .5835"

BODY

The body is apparently the same R-13 body.  Just with a different barrel and bell. 

Notice the body cutouts for the right hand spatula keys to keep the keys low to the body (5th and 6th pics)

BELL

The bell is very light, seems like it is made of balsa wood.  Other than the weight, the top part of the bell has a concave section in it (3rd pic)