A striking diamond set plaque brooch, platinum, handcrafted circa 1930's, presented as a rectangular plaque of pierced geometric design, featuring through central line three old cuts claw set, each spaced by grain set frames of smaller diamonds, the outer two further detailed by baguette cut diamonds bezel set, the centre by six individual old cuts also claw set, finely detailed throughout fitted with pin and roll catch. Length 5 cm A.T.D.W.: 3.65ct.