Such is the case with its T1 class 4-4-4-4 duplex locomotives. In spring 1942, prototypes Nos. 6110 and 6111 were quietly rolled from the Baldwin Locomotive Works. The Pennsy liked what they saw ...

The earliest 4-6-2s were built by the Baldwin Locomotive Works in 1901 for 3-foot ... 1886 in the form of a twin-firebox Camelback named Duplex - in service until 1898, but before being converted ...