From the Joe Collias book Frisco Power. First photograph was taken at the depot at Hoxie, AR in 1956. Second photograph shows a meet of trains No 875 and No 876 in Poplar Bluff, MO. Photograph is undated.
Please see this for more information. http://www.frisco.org/shipit/index.php?threads/combination-car-844.13831/