Good evening, I purchased a Gibson Hummingbird at the Chicago Music Exchange back in 2008 and am trying to figure out its origin & value. I believe it's a 1963, and it's absolutely stunning. It has a 6 digit serial number (121867) and it says "Kalamazoo, Michigan, USA" on the sticker inside. Can't find this number using the Guitar Dater Project website.Any help and/or evaluations are welcome.Thanks!