Monday Mystery, Late 19th C Locomotive patent model

 I thought I'd run this by everyone once again, maybe we've picked up a steam engine fan or two since I posted this two years ago. 

 I got a request from the owner of this model to see if we can find out more about this model. It reputedly dates to the mid 1890s but to what aspect of the design is new or novel isn't clear. The model is impressive, 43" inches long or approximately 1 to 12 scale. 

The Atlantic 4-4-2 wheel arrangement was introduced in 1895 by Baldwin as a highspeed passenger locomotive for the Atlantic Coast Line but comparing the wheel locations and details in the frame with the locomotive shows differences. Perhaps the model illustrates some not very obvious details of the suspension system or mounting arrangement of the leading or trailing trucks, but guesses are welcome!

History of Baldwin
First Atlantic Coast Line 4-4-2

Kalmbach Steam Locomotive Cyclopedia

This Santa Fe Atlantic has a longer wheelbase but once again details are different- and it was a 1910 design.