This is a coal burning 2-4-0 or Porter type locomotive built by H. K. Porter in Pittsburgh, PA, in 1933 as #2 for the Western Pennsylvania Power Company and worked at the company's Coonellsville yard into the 1950s where it was apparently known as the "Highlander". The engine then spent some time in the 1960s in Ohio at the Buckeye Central Scenic Railroad.
It is on display in the Heritage Museum and Historic Park, McDonough, GA, and has been repainted and renumbered #7 in honour of an 0-4-0T (Tank) engine involved in a collision at Camp Creek in 1907 and known as "Old #7".