Joe Dircks. Now there is a name not many know. I met him when I was 32, 30 years ago. He use to vacation at a little hot springs somewhere in new mexico. Went there to meet him. I remember that he had retired, the first time, the year I was born, 1943.
Joe, of course, made two straightline progressives, the Dircks and the Tri-Standard. Still have his pictures of those, I think. The Dircks, as I recall, was totally automated. Electric motor to power it. The Tri-Standard, made some years later, was hand powered. Don't remember the company history anymore.
One thing you might consider is calling Tony Sailer. Last I knew he still lived in Owen Wisconsin. I think that Tony got rid of most of his press collection but you never know.