The 2026 was classified by Lionel as a Prairie-type steam engine. It's a mid-size steam engine and was sold as an 027 gauge item. The early 2026 is a fancier locomotive compared to the later version. In addition, the 2026 shares its boiler casting with other Lionel locomotives such as the 637, 2016, 2018, 2029 and 2037 steamers: however the internal workings are different.
The 2026 was Lionel's preferred powerhouse locomotive for their mid-level sets between 1948 and 1953. It was the lead locomotive for eight sets in the five years of production. Interestingly, the first 2026 set in 1948 was a passenger set -- while the remaining seven sets were all freight sets.
Lionel used the same catalogue number (2026) for two independent production runs. This 2026 steam locomotive was from the first production in 1948 and 1949. Although Lionel used the same catalogue number (2026), the second production from 1951 to 1953 in most cases parts are not interchangable between the early and later versions.