Ring with sapphire, 2-row entourage of 24 brilliant-cut diamonds

Ring with sapphire, 2 rows surrounded by 24 brilliant-cut diamonds totalling ca. 1.2 ct, ca. WHITE (H)/VS-SI, sapphire in faceted oval-cut, ca. 2 ct, 18K white gold, 8 g, ring size: 53, W: ca. 3.3 - 20.4 mm, 2nd half of the 20th century, minor signs of wear.