Class 1550
Locomotive 1564 hauling a train of cars at Águas de Moura in 2009
Type and origin Power type Diesel-electric Builder Montreal Locomotive Works Model MX 620
Specifications Gauge 1,668 mm (5 ft 5+21⁄32 in)
Career Operators Comboios de Portugal Class Série 1550 Locale Portugal First run 1973

The Série 1550 are a series of 19 diesel-electric locomotives built for the Portuguese Railways (CP). They entered service in 1973; they were built in Canada by the Montreal Locomotive Works (MLW).^[1] The locomotives are MLW's type MX 620 design.

• List of MLW diesel locomotives