• This model is in "Excellent" condition.
• It's unpainted. Please be sure to check out the photos to see what you think.
• The original box and foam are included.
• It runs well. On a scale of 1-10, where 1 is quiet, we'd rate the running noise level at 6.
  

The Mason Bogie is a type of articulated steam locomotives suited for sharp curves and uneven track, once commonly used on narrow gauge lines in the U.S.. The design is a development of the single Fairlie, and is sometimes, and perhaps more properly, known as the Mason Fairlie.

Approximately 146 Mason Bogies were produced by William Mason's firm between 1871 and 1890 when the firm built its last locomotive, of which 88 or so were narrow gauge units, the rest being standard gauge. This was about half the firm's total output of locomotives during this period.

The best-known locomotives were those on the Denver, South Park & Pacific, and they rostered fairly large Mason Bogies, mostly of 2-6-6 and 2-8-6 wheel arrangements, and had a lot of success with them. Some of these locomotives were later sold to the Burlington and Northwestern Railway. Another problem with the Fairlie design showed itself in Colorado, the surprisingly poor tracking of the powered bogie. It would both hunt, or wander, when on straight track, yet provide more resistance to turning when it hit curvature than might be thought. This manifested itself in much greater wear on wheels and track than might have been expected.

The Boston, Revere Beach & Lynn Railroad continued to purchase Mason Bogies even after the closure of the William Mason factory, ordering similar locomotives from other builders as late as 1914 and operating them until electrification in 1928.