In the Wikipedia article on "Lunch atop a skyscraper", there is a section about the process they went through to attribute the photo to Charles Ebbets: https://en.wikipedia.org/wiki/Lunch_atop_a_Skyscraper#Author There is no mention of this photo, and it looks very little like the photo of him on the (deceased) artist's home page: https://www.ebbetsphoto-graphics.com/page/about-the-artist/#...

I'm quite certain that the picture is not what it claims to be. But I'm glad the Reddit thread got me to check it out.