Since you asked. It's a Lionel E7 unpainted that was an engineering sample of the Texas Special set 6-31755. Although the Burlington E7 had what is known as "Shadow Line" to represent the side fluting, I had this engine and just decided to do it as a Burlington.
It's a dummy engine that I use with my other E7's and E8's, otherwise I would have installed a fixed pilot from P&D.
Note that the first photo shows the coupler in black, I then painted it silver, less noticeable.
Contact me off list if you want to see more info and photos of my BR custom work.