Not sure if it will help this discussion much, the pic is a bit blurry but is the only one of this visit I have where the bracelet can be seen.
I think Mrs Diamond guess could be a good one on Queen Louise's bracelet. The edges of both bracelets seem to have a similar "wavy" design (I lack a better word now sorry), perhaps it could be a match.
--Previous Message-- : Strangley enough, I can't find another : picture! I'll keep on looking for a : close-up. Meanwhile, my guess is "the : other big diamond bracelet" (not the : zigzag one that Lilian used to wear). See : picture below of queen Louise. : On top of the very big diamond bracelet, I : believe Silvia wears her Cartier golden band : (the one with screws). Thus. it looks like : the bracelet is even bigger. : : : (Sourve: www.noblesseetroyautes.com) : : :