Posted by Nellie on July 19, 2013, 7:50 pm, in reply to "Four more pics"
From my notes:
Young identifies only two 3 row pearl necklaces, pictured below here. For 315 "Soon after her accession the Queen had a triple row of graduated pearls made up from the family jewels, and, after a couple of years had the top row extended, since when this pearl necklace has been a favourite for daytime wear." For 316 simply "triple row of pearls" but Young does list them separately. They look quite alike to me.