Vanished Tool Makes: Poper Iron & Wire Works

When I first saw this coping saw hanging on a nail in a neighbour's shed, I was sure it was a British-made Eclipse.  Nope: made by the Poper Iron & Wire Works of Chicago.  From my quick search of the web, there's virtually nothing on this company or this tool.  Either they didn't make very many, or for some reason almost none of them survived.  Odd.