“There was a plane crash and everyone on board dies. Cecilie was pregnant and she must have given birth during the flight or the crash because the baby is also found.

“Awful, terrible but the tiara survives through the crash, through the wreck, through the fire. So you see why it’s known as the haunted Strawberry Leaf Tiara.”

Prince Philip lost his sister Cecilie, brother-in-law Georg Donatus and nephews Prince Ludwig and Prince Alexander in the accident.

The Hereditary Grand Duke and Grand Duchess of Hesse left one daughter, Johanna, who had remained home as her family headed to the wedding of her uncle, Prince Louis of Hesse, to Margaret Campbell Geddes.