[1967? Barney Kessel Custom serial number verification, help]

Thanks for the ideas.  I didn't think about the pots or an inspection mirror.  Excellent.  Cheers Sgt!

[1967? Barney Kessel Custom serial number verification, help]

Hi all!  I have what I believe is a 1967 Barney Kessel Custom, serial number 563700.  I love the instrument.   It has the SN embossed on back of the headstock, above the gold tuning pegs.  I also has gold pickup covers.  There  is no serial number print/stamped inside the f-hole.

How would I confirm its age and if the instrument is stock?  I was told that is was when I bought it 10 years ago (from a reputable NYC music shop).

Thanks,

Chris