See what we have here:

Its clear that both pickups are a little different.

I started with the one at the bottom.

Because the resin is so old and brittle it wasn't very hard to take apart.

You can see the construction, two magnets glued together with six nuts. There is also a piece of copperfoil to shield the coil

Once apart I could access the wires and to my surprise I've got a reading on my measuring device!!
So this one is not dead and I can reassemble it and it will work great again.