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Data corrected with the 28 Nov 2016 Game Update.
Data corrected with the 26 Jun 2017 Game Update.
The Mason Bogie is a type of articulated steam locomotive suited for sharp curves and uneven track, once commonly used on narrow gauge lines in the United States. The advantage of Mason's design is the swivelling driven truck for a greater ability to negotiate curves, and the large open space between the trucks to fit a large firebox unrestricted by the wheels.
There are 2 Christmas variants of this locomotive: