So the thing most troubling me now is the tuners. Does anyone else have an opinion/confirmation on them being original or real?
While they're not right for a mid to late 1970s bass, they do look OK for an early 1970s example.
My 4000 is a 1976 and has the standard Phillips tuner screws.
The slot screws were used earlier.
I've never seen a lefty S model from the early 1970s, but if Mr. Boyer says it looks ok, you can rest easy.
Again, I'd run the serial number to get the exact production date.
I'd bet on '74-'75.
If it doesn't work at all, it's a fake, but it looks pretty authentic, though quite uncommon, thus the high asking price.
). The finish is pretty cool as far as the color goes so I'd leave it unless from personal inspection it does not look good from a physical standpoint. Price may be a bit high but as noted above, lefties do command a bit of a premium, so if the OP is okay with that, then all is good.