Its Kira of Prussia (née Granduchess of Russia) daughter of Pss Vitoria Melita and Granduke Kiril. She married Prince Louis Ferdinand of Prussia.
--Previous Message-- : : Tremendous! Can you tell us who is wearing : it in your second pic please? : The back of the middle lady looks like : Princess Marina, Duchess of Kent, judging by : her "tiara". : : Edited for typos. :