I recently stumbled on this set of drawings showing some of Queen Mary's wedding gifts.
Three things interested me:
1. The sketch of the choker is the clearest indication I have seen that the gift was the choker I identified some years ago.
2. That the choker could also be worn as a tiara.
3. I have never seen a sketch of the bracelet given by the Ladies of Sussex before. I think we have seen it worn in a number of photos of Queen Mary.
I think Queen Mary might be wearing the bracelet in this photo.