I noticed that in Canada in 1976 the Queen wore a bracelet which is unknown to me. Perhaps some one has a better image showing the front of the bracelet.
I don't think that this is the sapphire bracelet which HM often wears with her sapphires. The two photos below show practically the entire bracelet which HM normally wears.
The second is a bracelet which the Queen wore at the Louvre in April 1957. I cannot confidently identify this bracelet, although I think it might be the Chain Link bracelet. If it is, then this is definitely not the bracelet HM wore in Vancouver with the Dubai sapphire necklace.