Bag #3, no instructions, no box

Question

I bought a box of LEGO bricks at a flea market. This bag came in it and we want to figure out what it is. The polybag says "3" and the number on it is 135149 but that’s all I have.

Answer 1

I think that is 7937 "Train Station"

Method:

1. I recognised the white girder piece as being in the Saturn V set
2. Bricklink then shows all other sets with that piece
3. Of the eight sets that have that piece in white, the 7937 also has two blue chairs and some grey ladders.