Yamaha BB series tuner wrench
I was asked to provide a photo of the elusive tuner tensioning wrench that came with the classic Yamaha BB basses back in the early 1980's.
I was lucky enough to get an older Yamaha BB several years ago that came with absolutely everything, including the tiny little wrench. These things got lost very easily, so not many are still with the basses today.
There are different ways to make one of these wrenches, but lately with the other 80's BB basses I've had, I've found that just finger tightening the collars provides ample tension on the tuner shaft.
I figured I'd post a photo of the type of tuners these wrenches were made for. Some folks have these BB basses and don't realize that the tuners have adjustable tension.