I have one in exactly the same color scheme, it even has the same missing paint.
They must have been hugely popular, cheaper, lighter and larger than the RCA portable and far superior to the GE 9" of the time.
Lots of kids probably got one for Christmas.
If I recall right, only the sets with the model number ending in AL were Aluminum cased, some of them had Steel, I think I have a blue one with a Steel case.
The Aluminum was probably a later revision to make them lighter.