unix developed on 11/20 with 20 on panel or machine that just said pdp/11?

[ED SHARPE]

unix developed on 11/20 with 20 on panel or machine that just said pdp/11?

Help - have a  nice  looking  11/20  plus  a  weird analog  computer and  a  Nike guidance  gyro platform  for  AJAX (  2  gyros loose  need  prints  to  rewire  correctly)      in  trade  for  and  extra  ribbon Mike  we  had.
so anyway today's  questions

-  bell labs  UNIX  machine   says  11  or  11/20
-anyone have schematics or wiring chart  for NIKE AJAX  Gyro Plantform?
Drop offlist  as  not  to  clutter  things
thanks  Ed#