The point about these gold stoppers is that Royal Crown Derby don't mark their factory second paperweights other than by putting in a silver stopper rather than a gold one.
So there is a thriving market in gold stoppers, as if you buy a silver stoppered paperweight, or one without a stopper, and put in your new gold stopper you can increase the value of your paperweight dramatically.
Same thing happens for Wade pigs.
you could TRY them with your Chinese weights.... certainly can't hurt!!