EUGEN THEODOR HIRNER ring with 2 fine sapphire cabochons and 3 brilliant-cut diamonds

EUGEN THEODOR HIRNER ring with 2 fine sapphire cabochons and 3 brilliant-cut diamonds totalling approx. 0.12 ct, RW (F-G)/VS, pear-cut sapphires approx. 7.5 x 5.5 mm, 18K yellow gold, 6.6 g, ring size: 51, W: approx. 2.9 - 7.9 mm, late 20th century, minimal signs of wear, with hallmark 'ETH'.