The 4-6-2 K-4s became the Pennsylvania's principal passenger hauler, possessing a consummate blend of speed and power. Often double headed on east coast limiteds in front of a Pullman consist, the K-4s was a common and beautiful sight on the Pennsylvania's rails, and became synonymous with that railroad's steam power.

Later, after World War II concluded, the Pennsy's needs changed and the K-4's appearance underwent a series of changes to better serve those needs. The most apparent changes showed up on the 1947 Postwar or Modern version of the K-4 and included a solid drop-coupler pilot, repositioned boiler front headlight and the addition of a steam generator below the headlight.

M.T.H. Electric Trains is proud to return the Prewar 1927 version and 1947 Postwar rendition of this magnificent steam locomotive to life in all die-cast construction. Featuring all of the craftsmanship and detail that make an M.T.H. steam locomotive the industry's best value, your K-4s will quickly find a home on your layout or in your collection for years to come.

In 1936, K4s No. 3768 became the Pennsy’s first streamlined steam engine. She headed name trains like the Broadway Limited and the Spirit of St. Louis.