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I've attached a photo of one end of a Talk-O-Phone travelling arm. I've embedded some questions in the photo which I think are easier to understand rather than write a bunch of text. In any case, the part that I call a "swivel", is it riveted to another part I call a "yoke"? Are they a unit? Or if I unscrew the yoke, is the swivel removable? I ask because my travelling arm lacks this part. I have the yoke, just not the swivel. It looks like a part that would be easy to turn if I had a collet for my lathe big enough to hold a piece of stock that large in diameter.

No. Unscrewing the yoke will not allow the swivel pin to come out.

What kind of lathe do you have?

Hi Jerry:

What I have is a watchmaker's lathe. I may have a collet that can handle the pin that fits into the support arm--maybe. If I want to duplicate the original, then I certainly can not handle a piece of stock much bigger than that.

I now understand why the swivel is NOT a loose piece: it needs to be rigid with the travelling arm so that the travelling arm rotates with the swivel as the swivel pin turns in the support rod. Was thinking about this earlier. The answer wasn't clear to me then. Now it is. I would need to make this piece, then attach it to the yoke as a single unit. The swivel must have broken off the original.