The front of this engine does look somewhat like a human face, doesn’t it. It reminds me of the movie „Silver Streak“, when, at the end, after the run-away engine has broken through a wall and come to a halt in the hall of the Chicago railway station, Grover T. Muldoon [played by Richard Pryor] comments that it looks like the locomotive is actually grinning.
Well, I know that the „Puffing Billy“ was quite a different locomotive, but I think the name would have been appropriate here, too – judging by the looks of that engine, which, btw, is propelled not by steam created with a fire inside the engine, but by compressed air in its huge tank. This makes it safe in an environment with fuels, as it wa used by the Standard Oil Company.
From the railroad museum’s website: „M&PP No. 1 is a unique locomotive specially designed to climb steep mountain slopes with grades up to 25 percent. The underside is equipped with a toothed cog wheel. As the wheel turns, it connects to a stationary rack rail in the track, thus helping to pull a train up the mountain or provide braking on the way down.“