Authentic Vintage Christian Dior Clip earrings--hard to find

A vintage pair of Christian Dior Clop earrings. Cobalt blue crystals with resin ? clam shells. These earrings are not signed. Please refer to House of Dior (Antique Trader) online for information on when and why some of the Dior jewelry was not signed. Be assured these are authentic. Bought them myself at Nordstroms a number of years ago. These earrings in this design are hard to find today. In excellent condition. No issues. About 2.5 inches big.