During the early 1900's, photographic evidence points to variations in what one might assume to be the standard livery, which were seen post 1930. During these days, the locomotive class appeared below the "FRISCO" on the cab sides. We have also seen examples of the division assignment being applied to the cab side. See http://www.frisco.org/shipit/index.php?threads/southern-division-steam-locomotive-lettering.7075/ A recent thread on FB about the Kansas City, Ozark, & Southern included this article from the Douglas County Historical and Genealogical Society. http://theozarkuncle.com/Documents-History/2005-Railroad.pdf On the last page of the article, a picture of Frisco 3632, nee 1632, 632, nee 115, purports to depict the locomotive handling a two car Ozark Southern mixed train at Mansfield. What caught my eye was the lettering on the tender's rear. We all know that the Frisco lettered the rear of the tender with the reporting marks, SL-SF, on the top row, underneath which were placed the tender's fuel and water capacities. In this 1922-1923 era photo, the 3632 proudly displays the reporting marks, KCFtS&M. Can we interpolate from this that the antecedent roads' equipment were so lettered, and not to mention the several classes of locomotives that were placed on the Memphis Road's books after the 1901 merger.