wow that 1 is highly modified.
here's pics of 1 I have, problem is the high wear areas are worn, both the round rod in the lever and the lever itself. almost all the 1's I've seen are worn there. Mark A was working on newer lever that actually followed the rotation better, not sure how far along he got with it.
I modified mine on my 45 using a bronze bushing, posted a thread in the 45 section about it.