They had a huge factory in West LA, on either Pico or Olympic Blvd. Gone now of course. We saw of few of them in the shop I worked in during high school and as I recall they were really great sets. A little different than the RCAs, Zeniths, and Motorolas we were used to. I think maybe my favorite set we ever worked on was a massive Packard-Bell combo that had what looked like a Zenith chassis standing up (I want to say it was modular and had tubes but I may have imagined that), and the stereo tuner looked like a radar screen.
Here is a video of a NOS PB console.