WITHOUT RESERVATION ART DECO PLATE BROOCH In platinum, depicting a bow set with an old-cut diamond weighing approximately 1 ct, the loops set with baguette, old-cut and 8/8 round diamonds. Circa 1930. A diamond and platinum Art Deco brooch, set with an old cut diamond weighing approximately 1 ct. Circa 1930. No reserve. RC : Dimensions : 8 x 4 cm. Gross weight: 42.1 g (Pt - 950 for the body and 18k - 750 for the pin).