Gary Thompson also contributed this view of Chicago & Alton 2-6-6-2 No. 702. The K-1 class had 62-inch drivers and sustained a boiler pressure of 200 pounds. The rear high-pressure cylinders had dimensions of 22x30 inches, while the front low-pressure cylinders (with slide valves) had a larger diameter of 35 inches but the same stroke of 30 inches. The locomotives weighed 148 tons. No information is available about the location or exact exact date of this photo, but the men's clothing style suggests it was taken when the engine was comparatively new.