HELP THE T1 TRUST: https://prrt1steamlocomotivetrust.org/enter-to-win #trains #steamlocomotive #t1trust #pennsylvaniarailroad #construction #prr5550 #railroadhistory Thousands of different types or classes of locomotives were built during the steam era on America's railroads. However, only some classes survived into preservation, with the vast majority being scrapped. The Pennsylvania Railroad T1 was one of the more interesting locomotive classes that was not saved. These were unique duplex loco