Pennsylvania Railroad | Wilmington, Delaware | Altoona works class DD2 electric motor | 1957 | Steven E. Senard photograph | Morning Sun Books collection | 35mm color slide | DD2 5800 was a prototype engine bult in 1938, designed for freight service. In an articulated 4-4_4-4 wheel arrangement, it was never placed into production and prototype #5800 was in service for many years until scrapped in September 1962.