The Pennsylvania Railroad experimented with different builders and type of locomotives until they found the best design. Highlighted are various classes of steam locomotives like the K4 4-6-2, S1 6-4-4-6 Duplex and T1 4-4-4-4 Duplex, diesel’s like Alco RS models, Baldwin end-cab switchers, Fairbanks-Morse Train Master, Electro-Motive GP series, F-units and E-units, along with the legendary bi-directional, center-cab GG1 electric locomotive. Also featured with this collection of previously unpublished archival photos are a system map, timetables, advertising and locomotive designs by well known industrial designer Raymond Loewy. Revised edition with 16 pages of color and revised and expanded captions. Bridgewater Book Group LLC. 126 pages. size 8.5″ x 10″ softcover.