Here's two blow ups of the interesting areas:
First the bridges and the 42 loco.
The 42 loco has black painted center hubs and block New York Central lettering. The lettering is very early, and was only done for a short time. The black hubs might mean the loco was "dressed up" for the display.
The smaller bridge does not look to be the same as Jim's.
Check out the combine on the bridge. . . that 7 train set has the combine between the Pullman and the observation. That means they probably hired one of the ancestors of a Liveauctioneer's worker. Seriously it may give a clue to the man setting up the display. If this man grew up in New York City, he might not be familiar with passenger trains. At that time the regional trains were coming into the city underground. Just judging by the man's hairline he is in his early to mid 20s. He might have never seen a passenger set.
That bother's me. I'm thinking these are is is a photo of a Lionel trade display. Maybe at the toy fair?
Here's the back table:
You can supersize that by clicking on the hash and square in the right corner of the image.
The second table appears to be the smaller Lionel sets. I played with the brightness and contrast and can see a 33 with a 35 Pullman right behind the man's left elbow. The forward loop looks to have a 36 or 182 observation. - short platform so I bet 36. Behind that is probably the 182.
I bet those boxes in the back are full of trolleys!
One of us is going to have to buy this negative and have large prints made we can see better.