WEMPE band ring with sapphire cabochon and 2 diamonds

WEMPE band ring with sapphire cabochon and 2 brilliant-cut diamonds totalling ca. 0.70 ct, ca. STW (I-K)/VS, oval-cut sapphire, ca. 8.3 x 5.9 mm, fine colour, 18K yellow gold, 19.5 g , ring size: 55, W: ca. 6.6 - 11.2 mm, 21st century, minor signs of wear, with hallmark 'WEMPE', numbered '6639'.