From FB group Vintage Transistor Radios
A thought occured. Do you think that Motorola may have had a lot of parts for tube sets and they decided to use them up by putting a transistor chassis in them?
If you break down a radio into its assemblies and/or parts, which of them has the highest cost? I would expect the case to cost quite a bit because it would be contracted out to a plastic molding company or whatever. The assembled chassis would probably be the most cost, lots of labor involved. Maybe the reason why several lines of radios may have a common chassis. It would be interesting to see the Bill Of Materials for one of these old radios.
