Vincent Massi posted:Hot Water posted:Hot Water you are correct.
Two sites have posted this photo as a "Pennsylvania Railroad. Streamlined 4-6-4, Hudson type (PRR Class P6), along the lines of the P5a electrics." But it does not resemble the P5s at all. Nor does it resemble the Hudsons. And I cannot find any listing of a PRR Class P6.
Researching farther, a fellow on Deviant Art claims to have invented it. It seems that the PRR didn't like the 4-6-4 arrangement because it did not provide enough traction for the mountainous sections of Pennsylvania. So this fellow designed (on paper) a steam locomotive using the 4-6-4 arrangement that could succeed in those areas.
Hot Water, I'm impressed.