I think that was only advertisement for Alembic gadgets and accessories, I remember seeing that same picture on ebay long time ago, but I could be wrong...

Yeah, it looks like the headstock was modified at a local bar by an overzealous player and then further modified in an attempt to even it up some.

Hello Alembic Family,
 
As some of you may know, I have been without an Alembic axe for a very long time (read years). I have finally found what I hope will be My Alembic bass. It is this one that was recently made available on the Bass Northwest website. I put money down to hold it, and now I need to raise funds to complete the purchase. I am attempting to do so via the crowd funding website, Indiegogo.com
 
https://www.indiegogo.com/projects/no-more-dreams-deferred-my-alembic-bass
 
I think some here can relate to my situation, and I hope you might help spread the word, even if you are unable to contribute financially at this time. I have owned three Series basses over the course of my career, but each was sold in order to help finance the search for my children. There was, of course, no choice about that. But, as I note on the Indiegogo page, it is time to get back to my real work. And for that I need the proper tool. To paraphrase the line from the movie Risky Business:
 
Alembic. There is no substitute.
 
Thanks for reading.
 
M
 

Clearly that peg-head is not original to the bass and has been modified.
 
I suspect it was damaged somehow and this is how they chose to repair it

Susan, thank you for your confirmation to what some of us here suspected .    
 
    Wolf