AGATE SALT CASE, GOLD FRAME Probably England, circa 1770 The chased openwork foliate frame, the clasp set with a brilliant-cut diamond; with a small gilt painted glass salt case inside. Later hallmark, the owl's head (twice) H. 8.8 cm (3 ½ in.) Gross weight without bottle: 24 gr. Total gross weight: 31.8 gr. A gold-mounted agate salt case, probably England, circa 1770