[BC] Origin of acronym QKT

[PeterH5322]

>I figured  this was some random Bell System part number, similar to
>KS-whatever, but  if there's a meaning behind it, I would be interested in
>learning  more.

RA- designed and made by WECo, at least for its audio and cinema 
equipment lines.

KS- Kerney Standard - made by someone else, perhaps by Gray-Bar (WECo was 
originally founded as Gray & Barton, so you do the math on Gray-Bar and 
its WECo connection).

I guess RA- would be somewhat equivalent to RCA's MI- Master Index.