Vintage double neck
you are all set with this puppy! 1967 Gibson EBS-1250 Special vintage double neck bass & six string guitar http://clektr.com/fV5
Half six string, half something else, part curiosity and entirely awesome. Here's a look at the concept's past and present.
Gibson double neck 4 strig bass and 6 strig guitar
Lospennato Electric Guitars | Radiostar headless double-neck
1964 gibson ebsf double neck bass
I like this, probably the only way I'd play an SG-ish axe. Agile Valkyrie Double Neck Guitar White 4/6 w/Case - RondoMusic.com
GIBSON EBS-1250 "Jim Ramage" Custom Ebony 1964 | Chicago Music Exchange