Closer inspection *does* reveal teeny little spiky bits between the “blades”, but, on pages 165/6, Munn states specifically that “Although the present example [of  the fringe tiara] may incorporate some of the stones
from King George’s collection, it cannot be the same jewel as that
associated with the early days of Queen Victoria’s reign. In fact it[the
newer fringe] was made by E. Wolff & Co. to Queen Mary’s order in 1919…” Victoria’s was made by Rundell’s (p. 70).

 (Sorry I didnt have the chance to put the quote up when I made the original post)’