Postwar Lionel O Gauge 2353 Santa Fe EMD F-3a shells two original postwar shells with louvered roof vents, one has reproduction porthole lens and the other has original lens.  Two shells are modern reproductions with silk screened lettering and missing windshield, number boards and porthole lens.  Original shells have some touchups/repainting with good screw mounts.  Reproduction shells look C7-8.