Layered paint but the back was not painted
Cool sign. I can’t give advice on this one though. I’m not familiar with it.
The real question is what it would have been used for?
Not Ford Motor Company as they never used that lettering font - and would have never put their name in a rectangle ever.
So IMHO, minimal value.
Later . . .
I cannot find anything remotely similar online. Maybe an implement sign?