The Great Northern's class P-2 Mountain types came from Baldwin Locomotive Works in 1923 as the road's premier passenger power of the time, entrusted with the Oriental Limited and other varnish. Lacking the squarish Belpaire firebox and front-mounted air pumps favored by the GN, they have been considered its the most attractive steam locomotives. They were delivered with 2000 p.s.i. of boiler pressure, later raised to 210 p.s.i., and they had cylinder dimensions of 29x28 inches and a driver diameter of 73 inches. With a locomotive weight of 357,000 pounds, they developed 57,580 pounds of tractive effort. Their evaporative heating surface was 4971 square feet as delivered (later somewhat reduced) and they had 1368 square feet of superheater surface, with a grate area of 88 square feet. Some members of the class were built as coal-burners, but were later converted to burn oil. No. 2516 appears here at an unspecified location and date, with the lensman also not indicated.