Labels on Photography Photos

I was given some old large matted photos a long time ago. I still have. These photos were put in a Rochester show in 1953 and 1955. The stamps and labels on the back are interesting. Art Deco type. These are some of them.

I know nothing about these label alone on the back of the photos -- and if anyone knows, that would be Great. I realize this were just put on the back to accomadate the Photography show -- but it must have been an important Photography Show ( IMHO 0

Thanks