I saw this "boxcar" sitting in Lynden WA served by the
MILW at the time in 1972. No reporting marks whatsoever.
Looks to be corregated tin roofing shaped in box on
top of a 40ft flatcar. Whens the last time you saw a
40ft flatcar? Still has air hoses but I bet its never been
hooked up to the "air". My only guess it was moveable
tool shed or to store something else. Since this car
has no name or type or owner..kind of a challenge
to find out anything more. Just thought I would add
this to your general overall knowledge of railroads.
If you are in a horror movie, you make bad decisions, its what you do.