http://marc.info/?t=104968979800010&r=1&w=2
 On 3/5/16, Dennis Boone <drb at msu.edu> wrote:
  A couple more for the keys file:
 Allegedly Control Data used a National C415A on Network Processing
 Unit cabinets in the late 70s, early 80s.  That's an Ilco 1069-N, cuts
 are 12343 from bow to tip.  Cut spacings are .156 .249 .342 .435 .528.
 Depths are 1=.250 2=.225 3=.200 4=.175.
 TI apparently used Chicago C2132 on at least some 980 and 990 cabinets
 and CPU keyswitches.  That's Ilco 1041-G.  Chicago double bitted keys
 aren't really code cuttable as far as I know.  You copy a guide key, in
 this case H2132, onto your proper blank.
 De
 
 --
 Chris Halarewich