The first three tractors on the right are four wheeler Silver King tractors which have Hercules engines in them. The first one is 1936 and the next two are 1939's. The last two tractors in the photo are three wheelers which have Continental engines and are a 1939 and 1949. The manufacturer was the Fate-Root-Heath Co. of Plymouth, Ohio.
The fourth tractor a 1939 three wheeler belongs to John Rosenthal of Clarence, New York and the other four tractors are owned by Daniel Rosenthal of East Amherst, New York.