Hi,
This guitar is good old example.
My guess is Zebra top, Birch core, Walnut back.
My 75-145, 75-147, 75-150 have Birch core and looks are just like it.
I agree Walnut & Maple neck.
I think the guitar is not too neck heavy.
My 75-145 SSB is not to dive.
Back strap pin is correct position for the balance, nowhere the other.
Eiji