I have an Olympia Splendid 99 with a non-functioning margin release mechanism. It used to work fine, but then, suddenly not. I suspect it has something to do with a tiny O-ring of metal that I found in the typewriter's case the same day as the mechanism stopped working. However, I cannot figure out where the link between the button and the internal mechanism is, and where the ring goes. I would be grateful if someone could post a picture of the mechanism, or, better still, guide me as to where I might find a drawing of it.