The ALCO PA1 2000Hp. built from 1946 to 1949, gear ratio gave speeds of 80mph, 90mph, 100mph, and 117mph. used for passenger trains, later freight. The engine had an exhaust-actuated turbocharger so that until the engine revved up to speed there was a lack of oxygen causing improper combustion and a lot of black smoke.
This is Lehigh Valley 610.In 1948 LV got 14 PA1s, numbers 601 to 614, no Dynamic brakes.