F7A SLSF 23 F7A SLSF 23. Location is assumed to be somewhere in Kansas. Photographer unknown. Slide is dated August 1968 Edit 3/3/2024: F7A SLSF 5023 originally. Renumbered when a new International Business Machines (IBM) computer and equipment track system was installed by the railroad in 1968. Location is Cherokee Yard, Tulsa, OK. Also see related photograph of the unidentified number GP35 on the right. https://www.frisco.org/shipit/index.php?threads/gp35-slsf.14441/ Note the former box car on the left that has been repurposed as a storage shed. MKD
