https://reverb.com/item/4078616-alembic-series-1-fretless-1981-series-1-fretless-rosewood-1981-rosewood

This looks like the Series I that moderator Dave owned for a long time....

Confirmed here... http://club.alembicguitars.net/index.php?topic=22181.0

Also within that thread, this bass did belong to a Club Member. If I weren't waiting for delivery on a Custom Fretless 5-string, I'd have already bought that one. It's a beauty. 

Wow, very nice. Will not last long at that price.

I had the chance to play it while Dave still owned it. It is a very nice fretless.