I have one of these too! It's a wonderful, if absurdly heavy bass. Mine's a P bass type body made of solid koa. With a P/J pickup combination of unknown maker and a gold Badass bridge. Mine has a profoundly deep, even tone, unlike any other bass I have, Alembics included, and as a souped-up Fender substutute it's quite brilliant. Not a substitute for my Series II however!
I recently emailed Geoff Gould, founder of Modulus, about my bass and he was extremely helpful about it. The neck is essentially an early Modulus graphite chopped strand affair. The body and assembly was probably by Stars Guitars, who apparently shared premises in San Francisco with Modulus at this early stage.
Geoff Gould says the Almebic name was licenced to them for a short while, hence Modulus/Alembic title. I'd be very interested to hear Alembic's side of this story too! Later Bassstars dropped the Alembic tag I think.
I've never taken the neck off mine but the serial number may apparently be on the hidden end of the neck.
Ben