The 4-8-0 or Twelve-Wheeler type was a rarity during the steam era of the twentieth century in North America. The Norfolk & Western, the last major steam holdout, owned 56 engines of this type as late as 1953. No. 444, shown in this photo taken at Cincinnati in September 1954, was a representative of class M, built by Baldwin and Richmond in 1906-1907. These engines weighed 206,200 pounds and mustered 40,163 pounds of tractive effort. They had 56-inch drivers, 21x30-inch cylinders, and 200 pounds per square inch of boiler pressure. Originally built for main line service, they ended their years in branch line and switching duties. The photo by an unknown photographer is in my brother's collection.