One thing that has puzzled me when looking at pictures of the NYC Dreyfuss Hudson, is when looking at the front of the engine, there is a rectangular plate with 2 holes in it, just below and to the left (facing engine) of the NYC System oval plate (see photo). It is also on the front of the NYC ESE engines.
My MTH Premier Dreyfuss Hudson does not have this, but my Lionel NYC ESE engine does. The Lionel version of the Dreyfuss Hudson has it also.
I think I have finally figured it out, but I thought I would ask some of the experts here on the forum, if any of you know what it is.
Here is a picture of #5451 taken in 1940 that clearly shows the plate and 2 holes. Also note on the left side streamlined cover plate (facing engine), there have been 2 grab handles added.