here's something quite fascinating. According to the eBay seller:
These are 2 of 5, custom made by Martin employee John Huber, for himself and other Martin employees for business travel. Purchased, by a collector, at the Martin Factory between 1965 and 1976, these guitars have been display pieces and not used instrumentally since. Both are solid folding body of 3/4" unknown wood species. They do not have electronics. Bridge and saddle work appear solid, however the "action" is not suitable for comfortable playing. [...] These models have been authenticated in 2010 by Martin employee Mike Dickinson, Exotic Guitars. Appraised at $500 to $750 each.
© 2012, Guitarz - The Original Guitar Blog - 10 years and counting!