Black Hills Central Railroad Engine #7 is a 2-6-2 with tender built by Baldwin Locomotive Works for the Ozan-Graysonia Lumber Company in 1919. The locomotive was sold to and operated by the Caddo and Choctaw Railroad several years later. The "Seven" was sold to the Prescott and Northwestern in Northern Arkansas in 1938, and was acquired by the Black Hills Central Railroad in 1962.