I tried to respond yesterday but something wasn't working right. I am kind of a student of 1966-1971 Fenders, if anyone cares.
1. Maple boards are kind of rare in 1967. I don't think they were "officially" offered again as an option until that year, but they are seen on guitars, starting around 1965. From 1959-1965 they are extremely rare, almost unobtanium. I have only seen a photo of one true factory example.
I cannot tell from the photos, but check the neck to see if it is a veneer board. If not, something is amiss for a 1967. Only somewhere in early 1969 do you see the one-piece maple neck with skunk stripe again.
2. Someone added a second string tree at some point.
3. Check the peghead decal and count the number of patents. In 1967 there should be two. The decal appears to be a transition decal, which would be correct for 1967.
It is hard to tell authenticity from the photos, but I think that the seller is at least sincere. If there seller were to go through the trouble of faking (as opposed to being geniunely mistaken about) a 1967 neck, you'd think he'd fake an unmolested (and much more valuable) example.
Of course, I do the same thing when building the early CBS guitars I love, but I am not trying to fool anyone but myself.