The Duchess of Sussex' dress reminds me of the dress Crown Princess Victoria wore in 2011 for the Nobel Prize ceremony when she was pregnant with Princess Estelle. Neckline is a little lower, no slit and it has a train...but both look great!
I recently received this book and am really enjoying it. The pics are lovely and often show the royals wearing the jewels and then a blown up image so you can see all of the detail. It’s a gorgeous book and I highly recommend it to you all.