Frisco Flatcars c. 1913. In browsing through some of the old postings, I found Jerry Howe's note on a picture at DeSoto, MO of the Iron Mountain car shops in 1913. There are a couple of Frisco cars of interest. There is a small (looks to be ~40') flatcar, #94699, to the right in one of the panoramic pictures. Then, there's one to the left (longer, maybe ~50'); a fish-bellied flatcar that appears to have "S T L & S F" reporting marks; I can't quite make the number out, but it looks like #93971. I'd be curious to see more prototype info on this class of cars - how long were they used in revenue service, pictures, build dates, etc.