Chesapeake & Ohio No. 1633 is a class H-8 2-6-6-6 Allegheny-type steam locomotive built in 1944 by the Lima Locomotive Works for the Chesapeake & Ohio Railroad.
It was used on the Chesapeake & Ohio Railroad, where it worked hauling freight trains.
The locomotive was retired before the C&O began replacing the fleet with diesels in 1952. By the mid-to-late 1950s, the locomotive was sold for scrap.