Well I don't have too much to add, that display from Citicorp is just spectacular. I did see it once in person and it was truly amazing. Here are a couple of my modest trains for the post.
Here is the NYC type S from Grand Central station with a little utility train. The Lionel #152 is from 1926-1927
Here is the hardy Marx Alco S-2 with a short freight from the 1950's.
Best Wishes
Don