Good luck. I wish it was out here in California... he hehee

I would doubt that bone nut is original, Looks like a modificaton to me!
 
Great bass all the same. love it!
 
John

I think that the nut is original to that bass.  
 
I once had a short scale bass that I sent back to Alembic for a neck repair.  I thought that since they had to remove the fingerboard, that they could replace it with a fretless fingerboard.  So they did.  When I got the bass back from Alembic, they also installed a bone nut.  When I asked about this, I was told that it gives a more consistent tone between a fretted and open string being a fretless instrument.  Makes sense I guess.
 
They sure did an incredible job of converting that bass to a fretless.

John,
I would bet the bone nut is the original. I previously owned the John Judge doubleneck, and it had a scalloped bone nut that was replaced with a scalloped brass nut to match the 8 string neck. Christian now owns it in Germany. He named it Peggy.
Kris