Late '80's (probably 86-87) Spoiler fretless
Medium scale (32)
Fingerboard has very little taper to it (takes a little getting used to, but allows for very clean playing)
Active/passive switch
4 position Pickup switch  
Beautiful conidition, recently set up, new XL flats
case included
 
$2500

Should probably mention, I am located in Pittsburgh.  Bass is also listed on craigslist with pictures.
http://pittsburgh.craigslist.org/msg/2529672376.html

> > > > Just a suggestion... Have you checked here with Mica on the file for this bass? There are certain details that seem unclear to me, like the active/passive switch, AFAIK Alembic does not work like that... also, a 4 position pickup switch should be neck/neck+bridge/bridge and eventually off, the Alembic tone position would be instead the small toggle switch for activating what I think is a Q filter, whose frequency is adjusted on the chickenhead knob... but I might as well be wrong. I'd check with the Mothership those details... > > >

Spoiler electronics are 4-way selector (chicken-head), volume (round), filter (round; sets roll-off frequency for low-pass filter) and Q-switch (mini-toggle; adds boost - 8dB? - at roll-off frequency).
 
The first 2 digits of the serial number will give you the year (i.e. '86 would be 86Sxxxx)
 
That's a nice top!
 
Peter

Thanks guys - obviously I'm not incredibly familiar with the finer details of the Alembic.  My main bass is a Spector custom from the early 80's.  This one I happened to get in a trade.  I will check with Mica as well.  Thanks again.

I have a feeling the active-passive switch that you refer to is the Q-switch - the frequency boost might seem like it was switching to active, but it's all active!
 
Beautiful bass, by the way! Good luck with the sale!