An Art Deco sapphire and diamond brooch, circa 1920

An Art Deco sapphire and diamond brooch, circa 1920, of elongated oval outline, centring on a row of millegrain-set circular-cut diamonds, the largest weighing approximately 0.60 carats, among sections of calibré-cut sapphires and borders of circular-cut diamonds, mounted in platinum, length 8.5cm, original and attractive fitted case in blue leather with gold tooling, stamped Rowell & Son Ltd, Oxford