I've run into a brick wall with trying to braze thin sheet metal with multiple fails. While I think I can fix this, I am interested in other period correct options that may or may not exist - ideally I'd like to make simple (or perhaps mildly ornate) brass or even silver collars out of cast metal, which would save a lot of frustration. But I'd like to see some proof for non-princely examples of these collars from the period ~1250-1350 before doing such a thing.
A big part of my problem is that Oakeshott, at least, seemed to find the subject utterly unremarkable, even though he had a prominent example in his collection for many years. Sword in the Age of Chivalry does not seem to mention this at all in the otherwise lengthy section on hilt components, which is strange in the extreme and ought to have warranted at least a paragraph. As Oakeshott is still kind of the authority on this sort of thing, I have no idea where else to turn to for a detailed discussion on grip collars.
Is there anymore information out there that I have missed, or other sources that might help? Thanks for any help you all can provide.

