This view of L-4b No. 3138 was probably taken not long after the locomotive was outshopped by American Locomotive Company at the end of 1943, since it lacks the "elephant ear" smoke deflectors that always appear in photos of members of the class taken after 1945. These outstanding locomotives, designed for both heavy freight and fast passenger service, steamed freely due to an evaporative heating surface of 4675 square feet and a superheater surface 2100 square feet, together with a grate area measuring 75.3 square feet. They lacked a booster engine in the trailing truck, a feature that was being phased out in the 1940s due to high maintenance requirements. Wayne Koch shared this photo, photographer and location unidentified, from his collection. No. 3138 was stricken from the roster in 1954.