Unknown model 3
I'm not even sure this is a Westone - I've never seen a headstock that shape on a Westone, and a lot of the rest of the guitar doesn't look like a Westone to me, particularly the way the neck is fastened, the pickups and bridge and the shape of the rear plates and the body contours.
The manufacturing date of unknown model 6 (Which has the same headstock style) seems to confirm that this is not a Matsumoku or SLM Westone
Update 7th July 2007 - this is the WE1000, introduced in 1997 as part of FCNs attempt to revive the Westone brand