This brilliant necklace showcases a mid-century German blue moonglow glass button, it was manufactured by the renowned B. Schwanda Button Company, founded in 1887 by Benjamin Schwanda in Czechoslovakia. The necklace is finished with an antique brass chain and lobster clasp closure. Grandmother's Buttons specializes in heirloom jewelry handmade from antique buttons and vintage glass, designed and handcrafted in St. Francisville, Louisiana USA. Measures 20 in. Pendant measures 2 x 1.5 in.