I'd love to have one, never seen a live one - but
it was one of the experimental 68k based terms
brought to you by the makers of Unix(tm) ;)
While the BLIT was experimental (and contrary to other posters was
68000-based), it was commercialized as the AT&T 5620. It was the 5620 that
was based on a WE processor. We had tons of them at Georgia Tech. The
successor terminals (the 630 & 730) switched back to the 68000.
Check the FAQ:
http://www.bell-labs.com/user/dwd/5620faq.html
Ken