I don't see anything in any of my books, and here is an example I found on the net
I took a new offshore one apart recently and it had plastic one use locks, which would be completely wrong for an original, but did have locks retaining the weights, and memory tells me that they could have used those one way starlock washers, but it's been a long while
Is there a groove above the weight for a clip? FYI, I would not worry too much about it as long as it's free and lubricated. It's not like it can come up, you can't see it, and the idea is just to make sure it can move freely. Tight can be more precise, but too tight and it won't do it's job
