A collection of rail equipment is on display at the museum in Crewe, VA. I read some reports that this locomotive wasn't originally an NW unit, but can't tell you for sure.

Available information offers conflicting views about the original railroad that owned this engine but purportedly it was built in August 1952 as an EMD GP7 unit for the Atchison, Topeka and Santa ... (more)

I believe this is ex ATSF, ex Georgia Southwestern, and ex Virginia Southern. I guess just painted NW for the museum display.

Control Stand of unit painted by the Museum as NW 2185, former Virginia Southern 2185, originally Sante Fe CF7.