[CG]

I was thinking private also until I looked a little more closely. The small rear windows follow the lines of the burb rear. The larger windows next sort of follow burb larger and the ones closest to the doors are similar to the door size windows.

The cut out in the roof looks like they were there for some sort of light bar possibly. I was thinking an aftermarket builder of emergency type vehicles maybe put it together...

Or a private individual...lol...Im sure we will never find out =)