Hey there-- Looking at an interesting '67 PBass. Seems to be in remarkably good condition, and most interestingly, its Black with RW board! Seller claims that it's original, but I've learned to become a skeptical buyer. Was gonna ask for a neck/ guard off picture, but realized that even this may not help me, since some extraneous 3TSB colors inside the pockets would not be totally unexpected when custom colors of the era were sometimes sprayed over a sunburst finish. So, what features/ bits/ bobs should I be scrutinizing to help determine whether this is indeed an original finish? How common was the Black-RW combo at this time? Thanks much!