18ct white gold and diamond 'Tank Francaise' ring, Cartier, designed as a continuous line of stylised tank tracks, the centre embellished at intervals with trios of brilliant-cut diamonds, size L12;, signed Cartier, maker's mark, numbered N02478. Provenance: important jewels & watches, Smith & Singer (trading as Sotheby's Australia), Sydney, 18 April 2018, lot 139, illustrated. Private collection, Sydney, acquired from the above