The Lionel 675, 2025 and 2035 locomotives are three of the most iconic and sought-after engines Lionel produced in the postwar era. They depicted the Pennsylvania K-5, an ill-fated 4-6-2 Pacific locomotive that was intended to replace the iconic K-4, a popular locomotive that had roamed the rails for one of the largest railroads in the United States since 1911, and was later recognized as the official state locomotive of Pennsylvania. Unfortunately, the K-5 proved less successful and only two were ever made, although the PRR did run both of them into the 1950s.
Some documents identify the 675/2025/2035 as a K-4, but Lionel’s own service literature from the period says it was a K-5.
Lionel’s version proved far, far more successful than the real thing, almost becoming an icon itself. The first edition of Krause’s Standard Catalog of Lionel Trains, 1945-1969 featured a Lionel 675 from 1946 on its cover.