Claus Schlund wrote: 
"PRR (!) flat with load - in Tulsa?!?"
http://cdm15020.contentdm.oclc.org/cdm/singleitem/collection/p15020coll1/id/22376/rec/2517
 
PRR 474308, Class F30A.  Nothing weird about this at all - remember, during the steam to diesel transition era, general service flats were treated like general service boxcars, and empties were rounded up for the next load.
 
 
Ben Hom