Here is a blow up of the Tony Newton Triple Neck Bass with a comment on using the Mandolin style finger board. The guitar was made in the 80's by Rex Bogue,
Electric guitar kit Double-Neck / Mandolin Neck + Guitar Neck GK SBD 80 - BYGuitar
File:Bigsby double-neck guitar (1956), Mosrite, Harvey double-neck guitar (1957), Museum of Making Music (edit1).jpg - Wikipedia
Multi Necked Sedgwick Instruments
top quality QShelly custom alder body double neck 6/8 strings vintage tuners mandolin TL electric guitar musical instrument shop - AliExpress
Double Neck Mandolin-Esquire Fender - Audiofanzine
DIY Workshop: How to create a double-neck banjo/guitar hybrid
1958 Gibson EMS-1235 Double Mandolin Guitar. Double neck. | Guitarras
B-Compact Guitar / Mandolin Double Neck Custom Model - YouTube
The Flyer Acoustic Doubleneck Guitar -- Veillette Guitars
Tonedevil Double Neck Mandolin and Guitar - YouTube
MandoHarp - Hand-Made Double-Neck Mandolinola with Abalone and Mother of Pearl Inlay
Double Neck Mandolin/Ukulele - YouTube
Multi Necked Sedgwick Instruments
Double-Neck Electric Guitar-Mandolin | Antiques Roadshow | PBS
Is this doable? Mando/u-bass double neck. | TalkBass.com
Guitar Blog: Eko doubleneck guitar / mandolin solidbody
1969 Gibson EMS-1235 Double Mandolin double neck EDS-1275 Extremely rare Cherry red. Doubleneck. | Reverb Australia
Double Neck Mandolin/Ukulele | Circuits and Strings
1959 Gibson EMS1235 Double Mandolin guitars Gibson EDS1275 Double Necks Metallica | My Les Paul Forum
Double Neck Mandolin/Ukulele | Circuits and Strings
Custom Double neck Guitar/Mandolin Cherry Burst *Project Gutiar* | Reverb Australia
Gibson EMS-1235 Double Neck Guitar / Mandolin 1962 - 1969 | Reverb Australia
Double Neck Mandolin Guitar - Roper Guitars
MandoHarp - Hand-Made Double-Neck Mandolinola with Abalone and Mother of Pearl Inlay
Double Neck Mandolin w/ Hard Shell Case | Reverb Australia
