I wonder if this is the reason why Grand Duchess Marie, Duchess of Edinburgh and Saxe-Coburg-Gotha had this tiara, they look almost exactly the same and the other one was originally owned by her mother. Also she married in 1874. Could there have been a mix up about a tiara with pearl pendants being made for an Imperial wedding and the wrong Grand Duchess Marie was cited. Could this be where the story of the date came from.