As I recall it was a module, one of those black potted things with lots of pins, both Burr Brown and Analog Devices made many components in that style in the 1970s and 80s.
Yes, it might have been TRW but I'm 90% sure that it was either Burr Brown or Analog Devices.
I'm trying again for a more reasonably-sized picture and the correct alignment.
[OK, that worked, also fixing it in the original post.]