I tried to unscrew the two rods and no go. It feels frozen and I don't want to try and force it for fear of breaking it inside and I would never be able to get the left side off then.
I can get to the broken link and have managed to straighten it a little. But the link plate on one side is broken I see, so any kind of rivet will not hold it in place. My best bet is to grind off the existing rivet, expose the single plate and then add a new chain and find a pin or rivet that will hold it together. Don't know where one finds a rivet that small though or what to use.
If this is not the right forum, maybe I should post this on Classic and Vintage for help?