Hudson was a major American car builder at the time the Great Depression of the 1930s was about to begin. But it suffered greatly from hard economic times and resorted to clever facelifting to stretch a basic body architecture as many years as possible, as I related here.
Hudson launched an advanced, post-war product line for 1948 featuring low, streamlined, unitized (monocoque) bodies. Unfortunately for Hudson, such bodies are expensive to facelift, and standard-size Hudsons retained the same body and styling themes through 1953 -- six long model years. For 1954, before the American Motors arrangement happened, standard size Hudsons were given a noticeable facelift in a last-ditch effort to stay competitive in an era where the fashion was for somewhat boxy bodies. But by this time, Hudson was pretty much out of money, having spent much of its resources developing the Hudson Jet, a poorly-styled smaller car that did not sell well.