Technical Can someone identify this?

Trying to find out what vehicle this was part of, It has a single filament bulb that lights up the red light and license plate light. The light socket has been modified so I am not sure that was how it worked. Any ideas?
Thanks

 

First thought says Mopar something,,,,

 

Any casting numbers or markings?

 

Don't actually know but first impression is Kaiser, second Lincoln.

 

The chrome portion looks like a Mopar piece,but the the white license plate
bracket seems to be an add on. The chrome piece was probably mounted on the
trunk lid by its self. The license plate hanger was not part of the original package.

................................ Jack

 

1937 Oldsmobile big series car with 8 cylinder.