Like other North American locomotives that were among the first to feature a four-wheel trailing truck, the Chicago & North Western's Class H 4-8-4s were designed with an outside-cradle frame, in which the rear portion divides to the sides of the locomotive to allow for the deeper firebox and larger truck casting. A 1940 rebuilding gave these locomotives Boxpok disc drivers and roller bearings on all axles, and in the late 1940s twenty-four were rebuilt with new frames, cylinders, fireboxes, and other improvements and reclassified to H-1. This view of No. 3016 at Chicago’s Proviso Terminal in March 1953 displays the effects of the second rebuilding. The image, acquired through eBay, is attributed to W. Krawiec and was part of the collection of Harold Menke of Silver Spring, Maryland. No. 3016 was retired in 1954. For specifications of the H-1 class consult the commentary on No. 3026 following