Lady's Diamond Wristwatch, Cartier, ref. no. 23551.5502.31964, manual movement, white dial, applied black Roman numerals, rose-cut diamond-set crown, platinum square-shaped case enhanced with a border of millegrain-set single-cut diamonds, associated black strap, deployment buckle in yellow gold stamped '8734', dial signed 'Cartier', case stamped 'Made in France'. Provenance: Lord and Lady Casey thence by descent