Baldwin Locomotive Works delivered 0-8-0 switcher No. 333 to the Elgin, Joliet & Eastern in 1919, as a member of the AS-4 class built to USRA specifications. These engines had 25x28-inch cylinders and a driving wheel diameter of 51 inches, and sustained a boiler pressure of 175 p.s.i. They weighed 214,120 pounds and mustered 51,041 pounds of tractive effort. With 2775 square feet of evaporative heating surface and 615 square feet of superheater surface, they had 47 square feet of grate area. This builder's photo of No. 333, which was retired in 1949, appeared in a spare parts catalog issued in the 1920s by The Pilliod Company, manufacturers of the Baker locomotive valve gear.