I think it might have been Doug Cox. He had a good article in one of the model A magazines several years with pictures. He also sent me 25 or 30 pictures, which were pretty much the same as the article. If you can't find the article, PM me with your email address and I can send the pictures I got from him. He had a number of riveting notes close to many of the rivets to indicate which side the finished head was on.
Rusty Nelson