The Pere Marquette Railroad's 2-8-4s were another variation on the Advisory Mechanical Committee's Berkshire design, sharing features with those of five other railroads. They had 69-inch drivers, 26x34-inch cylinders, and a boiler pressure of 245 p.s.i. They had a locomotive weight of 442,500 pounds and produced 69,368 pounds of tractive effort. Their evaporative heating surface totaled 4777 square feet, their superheater surface 1932 quare feet, and their grate area 90 square feet. Lima Locomotive Works erected all the Pere Marquette's 39 2-8-4s; No. 1222 posed for the builder's photo of the N-1 class that was delivered in 1941. With the Pere Marquette's merger into the Chesapeake & Ohio in 1947 these Berkshires were to be renumbered into the C&O 2600 series, but the renumbering was never applied to the N-1 and N-2 classes; this locomotive would have become C&O 2656. Retirement of the former PM 2-8-4s was complete by 1957, though some were not scrapped right away but remained on the property until 1961. Two of them survived the torch; No. 1225 is operational at the Steam Railroading Institute in Owosso, Michigan.