NOTE: Lightweight sleeper Forward was developed in the summertime of 1936 as the main Pullman sleeping auto utilizing the "alloy-steel truss frame" approach. This motor vehicle was an addition to the main (heavyweight) Super Chief consist in November 1936 (following early Diesel models one-A, 1-B and leased 1-C [the https://chanceyarhw.liberty-blog.com/26232637/not-known-factual-statements-about-super-chief-strain