The Silverside gon with N&W 475 was taken in Bristol VA at the N&W yard during a September 1960 NRHS convention.  I have a color negative of 475 taken there; the Silverside slide you saw (came from ebay auction) showed part of an N&W GP-9 or -18 in the background.  There is another view of 475 with a set of stairs going into the cab for visitors and part of the Silverside in the background.

Jim King

SMMW

Sent from Mail for Windows 10