So, I finally got back upstairs... put on 2 pairs of 2.5x cheater glasses then peered through the articulated 5x LED magnifier and was able to confirm that it is a peened pin. I ordered the Eccentric Crank Assembly but I'm going to go on the hunt for a handful pins now that I am paranoid about the eccentric crank. I inspected the rest of my Newish Legacy Steamers and found that they have the same pin... not screws. On all of my older post war steamers those are screws... not pins. Your experience may differ.
Thanks to all who chimed in!!!