Lacy glass is thought to be of Bohemian origin, late 19th or early 20th century, reknown for its metallic back paint and lacy pressed front surfaces.
The color layer is usually painted over with black or silver paint to preserve it. This button may have had its border repainted, but if so, it was done a long time ago. The back has what looks like original wear. The border of silvery faux cut steels is silver luster. It measures 1 & 1/4" large and has a stunning design.