The photo RVN01407 that Al Brown mentions is posted at the Ronald Nixon
Collection of the Museum of the Rockies, with the caption provided by
Nixon, "Thought you might like a couple of unusual shots. This is NP
12275 and L&A 12275 in 602 at Glendive (MT) in September 1938. Both cars
were loaded with grain for Duluth. Railroad Magazine said the odds of
such an occasion were 782,000,000 to 1."

http://muse.museum.montana.edu/rvndb/rvnjpeg_img_rec.php?objno=RVN01407

Rufus Cone
Bozeman, MT