Dear fellow enthusiasts,
I noticed about 20 people read my question, but nobody
replied, so I broke down and called Lindy Fralin today
and this is what he said:
'70's Fender neck pickups
always had black bottom bobbins and are virtually
indistinguishable between '70 and '82.
He also said that they always measured 7 to 7.5 K,
unless they are breaking down.
As far as shielding goes, he said he occaisionally
sees "metal-braided shielding on top of a white coat
of plastic over the leads", but that the idea of a
black plastic shielding is not ringing a bell with him
and he doesn't think that would be original.
Lindy thinks that the lead wires would usually be
black and white on the neck pickup (and black and yellow on a bridge pickup), but that isn't always the case.
On the subject of the color of the lead wires, I can
tell you that in my experience, the yellow and the white
coating look almost, but 'not quite', translucent in a 'cheese-y' way, like the coating material is real cheap!
By the way, if any of this info doesn't make sense to
people more experienced in electronics, it's probably
my fault, not Lindy's. Your Uncle, Harry