Originally Posted by
Steve530
I can't tell if those are retrofriction levers, but here's a diagram of the retrofriction assembly:
Note that the two identical washers (B and C in Wooable's photo) are not flat. The diagram shows that they go on with their concave faces in contact to create a "bulged" structure, and not convex into concave which would create a "nested" one. I just noticed that after all these years.