ALCO Century 425
The ALCO Century 425 was a four-axle, diesel-electric locomotive of the road switcher type. 91 were built between October 1964 and December 1966.
Cataloged as part of ALCO's "Century" line of locomotives, the C425 was an upgraded version of the C424. The C425 employed the same main generator found in General Electric's U25B model.
Original Owners
| Owner | Quantity | Numbers | Notes |
| Chicago and North Western Railway | 4 | 401–404 | |
| Erie Lackawanna Railway | 12 | 2451–2462 | to BC Rail 801-812 |
| New York, New Haven and Hartford Railroad | 10 | 2550–2559 | to Penn Central 2450-2459, then Conrail, same numbers |
| Norfolk and Western Railway | 18 | 1000–1016, 1011 | 1000–1006 ordered by Wabash Railroad |
| Pennsylvania Railroad | 31 | 2416–2446 | |
| Spokane, Portland and Seattle Railway | 16 | 310–317, 320–327 | to Burlington Northern 4250, 4252-4265 |