Pennsylvania Railroad | Pittsburgh, Pa. | T-1 Duplex #5547 | August 27, 1949 | John Bowman, Jr. photo One of 50 production run Altoona Works T-1 Duplex models built in 1940's | Raymond Loewy stylized streamline appearance | Walschaerts valve gear installed on this engine to make it a T-1a. | All retired by 1950s and scrapped | 2x2 BW negative #1112