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Re: Crown Princess Margaret (Connagught) wedding gift Ruby bracelet
Many thanks for the link Altezania Monpox, but I strongly suspect that the concept of the bracelet being used as a base (as depicted in Ursula's page) is the result of photoshopping. I haven't seen any images of the tiara being worn which show the bracelet in use for the tiara.
For a lot of such images see this Pinterest account