The Tiara was only kept in that box since it was being worn by the bride of the Queen's son at the wedding.

In the same box was the Art Deco Diamond Tiara worn by the bride the following evening.

We saw Cartier hallmarks that led us to that conclusion, which will be properly confirmed in due time.

The Tiara arrived in the Queen's possession in a cardboard box from New York and there is no clue where the original case may be.