Here is my problem(s):
Set or fixed necks were only made in 1 year 1981. The "book" headstock was that year, not the "horned book" yours has. So there is an issue there.
The finish on the headstock is crap. Not even close.
The pickup cavity is rough and hacked up but still has finish on it. That just can't happen.
The knobs are wrong.
There is a circular finish crack around the G string tuner. Tells me the tuners may not be original.
It has many signs of authenticity. That makes me scratch my head.
Best I can say is that someone may have taken two broken basses and made one.
Many thanks for your reply, much appreciated.
The circular scoring around the tuner was done by the previous owner, taking the tuners off to clean them - same one who dinging the body up.
The hacked bit around the cavity, that was bare wood, I just touched up with marker pen so it didn't look too bad, I should have stated that earlier.
But as you say, the headstock is wrong, and messy as hell, and the knobs are wrong.
This is a tough one.