Cliff:
That's what I get for shooting from the hip ...
It was post-war that we managed to get down to one basic van body (well, two if you count the expandable) fo rthe 2-1/2 series.
I went back & looked & see where I failed to pay attention to window layout, a dead giveaway ....
Having said that, I can't find anything in my stuff other than exterior views. Do you have a side/rear view that appears to show the frame rails sticking out the back a foot or so ??
John