I've never seen this picture before. Thanks for posting, Nellie!
Something about the size and shape of this tiara reminds me of Princess Anne's mystery tiara. It doesn't remind me at all of the scroll tiara/halo tiara that Catherine Middleton wore for her wedding. I wish we there were other photos of the Countess wearing this tiara.
--Previous Message-- : : I always thought this was the scroll/halo : tiara worn by the Countess of Strathmore to : the 1937 coronation. : If so then it was lent by Queen Elizabeth : (QM) to her mother for the occasion. : : :