A DIAMOND AND COLORED DIAMOND RING, BY OSCAR HEYMAN & BROTHERS
Set with an oval-cut diamond, within a three-row oval-cut diamond and circular-cut yellow diamond surround, mounted in 18k gold and platinum
With maker's mark for Oscar Heyman & Brothers, no. 12539 (partially indistinct)
A DIAMOND AND COLORED DIAMOND RING, BY OSCAR HEYMAN & BROTHERS
Set with an oval-cut diamond, within a three-row oval-cut diamond and circular-cut yellow diamond surround, mounted in 18k gold and platinum
With maker's mark for Oscar Heyman & Brothers, no. 12539 (partially indistinct)