General Electric locomotive GE UM12C, State Railway of Thailand (จีอี (รถจักร))

The GE UM12C is a type of diesel electric locomotive manufactured by GE (General Electric locomotive) for Southeast Asian rail operators. It is currently in service with the State Railway of Thailand. It was also operated by the Manila Railroad Company and the Philippine National Railways from 1956 until 1999. While the units for both companies feature a shovelnose layout, the MRR locomotives were single-ended and had a cowl unit cab, the SRT locomotives are double-ended cab forward units. The Manila Railroad Company (MRR) announced the dieselization of its locomotive fleet in 1954. GE Transportation was selected as the supplier of diesel electric locomotives. The agency bought fifty units in which thirty were streamlined mainline locomotives and twenty were switchers. Twenty of these were the GE UM12C road switcher model MRR 2000 class. These were some of the first locomotives to feature the cowl unit design. The General Electric locomotives were introduced to the MRR in 1956. Along with the cab un