Be sure to add me to your favorites list Yamaha BBN4 III Bass Guitar Service Manual and Parts List Booklet. This is a printed paper hardcopy copy of a Service manual for the Yamaha model BBN4 III 4 string bass guitar. It would certainly be helpful when working on any of the previous BBN4 models as well. This one is extremely lightly used and includes: Cover sheet / TOC Overall assembly / exploded view of the diecast bridge parts list / full list of parts, * marks the new parts for the "III" model circuit diagram wiring / F R pickups, F R volumes Tone dial specifications / full specs on this bass This is a manual or document, this is NOT a piece of equipment or instrument. If you have any questions, I'm always happy to answer them. Thanks for looking and please check out my Store!