I was looking at some old newsreel footage of Princess Elizabeth during her visit to Malta in 1949.

In the video below, HRH is visiting the American ship the USS Des Monies to which she wore the Vanguard Brooch which she received in 1947.

I noticed something that I did not previously know.

If you look around the 3:30 minute mark, there is a good side view of the brooch and you will see that the central part of the rose is set "en tremblant".

It is set a good couple of centimetres (1/2 inch) from the base of the brooch. I was surprised it was so pronounced.

Here is the YouTube link: