It was brought to McCaw's attention that he might have a rare find by his close friend and guitar instructor Marc Intravaia. Intravaia had contacted Babiuk, who is a well known Beatles expert who wrote a book called Beatles Gear-All The Fab Four's Instruments From Stage to Studio. Babiuk examined the guitar and was able to match wood grain exactly. Wood grain is like a fingerprint, there are no two that are the same. - See more at: http://rockmusic.com/article/beatles-lost-guitar-auction#sthash.pHd5hYdY.dpuf