Master Series Gold (With Decoder & Sound) Single Headlight/Large Number Boards Advertised by Fairbanks-Morse as "the most useful locomotive ever built", the H24-66 Train Master was first introduced in 1953. Designed as a versatile locomotive with various equipment options available, it was found in both passenger and freight service across the US. It was the most powerful single-engine locomotive in production at the time, generating a total of 2,400 hp.