Ball MASON'S PATENT 1858 undropped a, ground lip shoulder seal, disconnected underline. no 3rd l. Wondering what Red Book number this one is??? Best picture I can get tonight..
Thanks much--that was the closest one I could come up with too. Red Book #9 didn't specify the "a"--RB #10 says dropped a but this one is undropped.....maybe a typo in the new book??