This is the outside storm door handle that needs to be replaced. It is a Cole Sewell door. The overall door handle is 6.5inches long with screw holes 5 1/4 inches apart. The door is 1 inch thick.
Dave Sr. from SWISCO responded:
August 20, 2019
Unfortunately, your handle set is no longer made. However, our 40-152 should be able to be used in its place just fine. Take a closer look and see if this is a match.