SNCF 62026 at Bobigny in 1983.

(Didier Duforest, CC BY-SA 3.0 <>, via Wikimedia Commons)



The Baldwin DRS-6-4-660, known in France as the A1AA1A 62000, is a road switcher diesel-electric locomotive built by Baldwin Locomotive Works between 1946 and 1948. The DRS-6-4-660s were powered by a naturally aspirated six-cylinder diesel engine rated at 660 horsepower (492 kW), and rode on a pair of three-axle trucks in an A1A-A1A wheel arrangement. 106 of these models were built for railroads in Morocco and France.


Diesel-electric locomotive A1A-A1A serial 040 DA of SNCF. These locomotives were given by the USA during the Marshall plan, ca 1946-1950.

(Tangopaso, Public domain, via Wikimedia Commons)


Name designation

DRS - Diesel Road Switcher
6 - Six axles
4 - Four powered axles
660 - 660 horsepower


Original buyers

Railroad Quantity Road numbers Notes
SNCF 100 040-DA-1 to 040-DA-100 Renumbered 62001-62100
Morocco 6 DB-401 to DB-406
Totals 106


Type and origin
Power type: Diesel-electric
Builder: Baldwin Locomotive Works
Model: DRS-6-4-660
Build date: 1946–1948
Total produced: 106
​• AAR A1A-A1A
• UIC (A1A)(A1A)
Gauge: 1,435 mm (4 ft 8+1⁄2 in)
Prime mover: 606NA
Aspiration: Naturally aspirated
Generator: DC Generator
Traction motors: DC traction motors
Cylinders: 6
Transmission: Electrical
Locomotive brake: Straight air
Train brakes: Air
Performance figures
Power output: 660 hp (492 kW)
Locale: Morocco, France