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Schwab · 05-15-2008, 03:34 PM

37 is the number of the mandrel used to shape the bell. All Bach Bb bells measure 4 7/8"

ML (.459) is the bore size as measured at the 2nd valve slide.

05-15-2008, 03:34 PM	#27 (permalink)
Schwab Moderator Forte User Join Date: Feb 2004 Location: the road Posts: 1,051	Re: Modified Bach Strad 37 is the number of the mandrel used to shape the bell. All Bach Bb bells measure 4 7/8" ML (.459) is the bore size as measured at the 2nd valve slide. __________________ Dylan Schwab Stage 1 New York