Looks like a very nice Series 1.
 
http://cgi.ebay.com/Alembic-Series-1-Bass-1980-cocobolo-mahogany-case-pwr_W0QQitemZ220219570892QQihZ012QQcategoryZ64402QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Very pretty - but it looks like Bubinga to me.

mmh, the pics are not very good. I have two Warwick Thumbs in Bubinga which look different in wood to this Sereis 1 - but there is a great range in different bubinga woods. There is burl and swirl and so on. I've seen a lot of different Warwick Thumbs all in Bubinga. Was Bubinga a wood option back in the 80s at Alembic? Is it today? I love the sound and feeling of my Warwicks - beside my Serie 1 in Lacewood ;-))

My Bubinga Persuader looks very similar:  

 

I agree. Looks like bubinga to me too.

I think the handles on either side of the headstock are an interesting feature.  
 
The top and back do look very nice in the pictures.
 
So does the Persuader!

I second that...and nice handles: