The S-2 Steam Turbine Type 6-8-6 Locomotive No. 682 was based on a prototype built by the Pennsylvania Railroad. This engine was deemed inefficient by this railroad and they only made one of them. However, in the "euphoria" of post-war toy train production, Lionel made thousands of them!

This locomotive replaced the No. 681 in 1954, and was available for one more year. It was produced on a BLACK painted die-cast boiler, this locomotive has the running boards painted WHITE on both sides. The number was heat-stamped on the cab and it has a number "6200" keystone decal on the front. Unlike previous editions of this locomotive, this version boasted the addition of valve gear linkage that was attached to the first driving wheel, and it came with Magnetraction, a three position directional unit, smoke, lighted headlight lens and a No. 2046WX (2046-50) tender that housed a whistle. This tender has bar-end trucks that have one magnetic coupler. There are no variations.

This, and other versions of locomotive were produced by Lionel for O and O27 gauge sets, however, they run best on the larger diameter O gauge track.