ART DECO PLATINUM AND DIAMOND BAR PIN,circa 1925. Transitional brilliant-cut round diamond weighing app. .65 ct. centered by three horizontal rows of total of 46 matched old European cut and transitional cut round diamonds together weighing app. 5.00 ct. in pierced trapezoidal bar setting. - L: 2 3/8 in. Estimate $2,500-3,500