Precision Glued Neck Joint http://www2.gibson.com/Products/Electric-Guitars/Bass/Gibson-USA/Tobias-Growler.aspxWhat makes this bass different from other Tobias Growlers both from the Michael Tobias and the (much derided among Tobiasites) Gibson (Gibson bought Tobias in the early nineties) era is the chrome hardware, the ABM bridge and the - a bow to Gibson tradition - set neck. (All other Tobias Growlers are bolt-on.)
I like the way you think, Ken.
I'll bet there is no tenon on the neck and it is simply a non-drilled bolt-on that is glued in place. Probably just getting rid of a pile of old Growler necks that were made and sitting in a pile....or ONE extra neck, hence the lack of more of them to sell Like those Gibson Epi's stamped "Official Gibson Prototype" I have, using old Grabber/G3 necks that they hacked off the lower body horn on to make a "new" model. Good drugs in that R&D department.