Photograph of Railway Mail Service clerks in Kansas City, Missouri
A group of thirteen unidentified postal employees pose with mail sacks at a back entrance to the old Kansas City, Missouri, post office. Most of the clerks were part of the Post Office Department's Railway Mail Service (RMS). Unlike Railway Post Office (RPO) clerks who sorted mail on board moving trains, these RMS clerks worked to move and process mail going onto or coming off of RPO cars.
National Postal Museum, Curatorial Photographic Collection