The Countess married George, later 2nd Marquess of Milford Haven - the 4 royal brides maids wear small horseshoe brooches - wrong way down - and a single black necklace with tassel plus a multo row black necklace.
The bridesmaids are the grooms sister Louise Battenberg, Zia Werner sister of the bride and Xenia and Nina daughters of Grand Duke George of Russia. Taken from current Majesty Magazine