Not meant to be an advertisement, but...
In case anyone is interested there is a Sept 1953 issue of Railroad Magazine for sale on eBay with a 16pg article with lots of pics from Sept 1952 by Philip Hastings. Description says it contains Pics of 480,481,483,486 and others.
Here's the listing:
The listing
Again, I have no financial interest in this. Just thought someone interested in that area might want to grab it.