I have an old sickle mower I am trying to get back up and running. It was missing the knife bar, and the piece that attaches the bar to the drive arm. It looks like it should be an L bracket with a 1" ball attached to it. I am hoping someone recognizes the set up and maybe has a picture and or some details. The missing piece is # 58 on the manual page, and the drive arm is #18. The knife bar in the photos is my spare from my Allis HB112. I think the missing knife bar would have a blank space at the end where the L bracket would attach.