•YEARS BUILT: 1946-1950
•MANUFACTURER: Alco
•OPERATED ON: Santa Fe; Denver & Rio Grande Western; Erie; Gulf, Mobile & Ohio; Lehigh Valley; Missouri-Kansas-Texas; Missouri Pacific; New Haven; Nickel Plate;
New York Central; Pennsylvania; Cotton Belt; Southern Pacific; Union Pacific; Wabash
•NAME: PA-1, PB-1 (cabless booster unit)
•QUANTITY: 208 (169 A units; 39 B units)
•HORSEPOWER: 2,000
•KNOWN FOR: Unique profile and elongated nose
•STATUS: Privately owned unit under restoration as Nickel Plate Road No. 190; Santa Fe No. 59 under restoration in Frisco, Texas

