•YEARS BUILT: 1924 to 1949
•MANUFACTURERS: Lima, Alco, Baldwin
•OPERATED ON: Multiple large railroads
•NAMES: Berkshire, Kanawha (Chesapeake & Ohio)
•QUANTITY: 611; C&O had the most with 130 on the roster in 1947
•BOILER PRESSURE: 240 psi
•KNOWN FOR: High speed freight service and super power; a unified design produced for Nickel Plate Road resulted in copies for the Erie, Pere Marquette, and Wheeling & Lake Erie; other railroads, notably Chesapeake & Ohio, picked up on it
•STATUS: Several in museums, two are operational in the Midwest: Nickel Plate Road No. 765, based in Fort Wayne, Ind., and Pere Marquette No. 1225 in Owosso, Mich.