Here's another real oddity:  the Bartell/Acoustic fretless guitar!  I had heard rumors of these for several years but had never seen one till now.  Supposedly, fretless Bartell guitars were also owned by Jimi Hendrix and, possibly, John Lennon.  I would post the original auction description here but it's long, rambling, and annoying to read.  I'm not sure why it has an Acoustic label on it but it may possibly be part of a group of prototypes Bartell developed for Acoustic prior to the Black Widow production.  Standard Bartell hollowbody construction with a 25.5" scale length, 22 fret neck.