Ring with sapphire cabochon flanked by 2 diamonds

Ring with oval cabochon-cut sapphire flanked by old-brilliant-cut diamonds totalling ca. 1.3 ct, ca. WHITE-STW (H-J)/VS, platinum 31.8 g, ring size 57 with soldered bucket, late 20th century, signs of wear, sapphire loose in setting, very solid ringshank.