This 0-4-0T (Tank) engine was built in 1905 by H. K. Porter of Pittsburgh, PA, for Wellerman-Seaver- Morgan Engineering of Cleveland, OH.
It weighs 24,500 lbs, has 27" drivers and 9" x 14" cylinders. A coal burner operating at a boiler pressure of 140 psi, it delivered 4,995 lbs tractive effort. It still has its original couplers, in which a pin was dropped by hand into a link to couple cars.
It was later sold to the scrap dealer Southern Iron & Equipment Co. of Atlanta, GA, and then to Atlantic Steel where it worked until the end of WWII, which by then its small size had rendered it obsolete.
Nowadays No. 1 is on display at the Georgia State Railroad Museum.