When I worked at Sears, they had:
Warwick
Wells-Gardner
Sanyo
Toshiba
I almost NEVER had problems with the Toshiba sets. The console Sanyos were good at blowing audio output transistors, and caps in the power supplies.
All the above companies supplied portables to Sears. I have several W-G, and Toshiba sets from the mid-to late '70's that are working... somewhat...
Oh yeah, on the KIRBY, I forgot to mention the reverse-thread on the shaft. Sorry about that, Chief!