Earrings with natural blue sapphires and 20 diamonds

Yellow 18 carat gold, diamond crowns in silver. Fineness Au 750/1000 and Ag 800/1000, total weight 8,25 g. Natural diamonds of single cut rosettes. Certificate of the Assay Office of the Czech Republic. Earrings made of yellow 18 carat gold of classic shape. Arc-shaped beds of sterling silver with 20 set natural cut diamond rosettes. Top oval gold crown with set blue natural cut sapphire. Earrings fastening with ladies patent. Marked: fineness 750, maker's mark 2278. Italy, Alessandria, second half of the last century. Height 20 mm, width 14 mm.