I did see this radio and you gave me a challenge to find out what it is because I don't actually know as of yet.
It almost looks like it has the face plate changed. It really looks 68/9 B-body....problem is that a dodge like my coronet would say "dodge solid state" and a Plymouth would say "solid state by Plymouth" They all said "Chrysler solid state" after 70 but the problem is a 70 B-body has a knob type radio so that does not ring out.
Another possibility is a 67-8 Chrysler 300 ....but again, the problem is if it were for a 300 the faceplate would have the old style number font.
I was going to ask another party for an opinion on this