Another rare Czechoslovakian old treasure! Transparent yellow on the bottom, and opaque yellow on the top. These are yellow glass, faceted, round nailhead beads. Concave on the backside, they are from the early 1900's. Glass nailhead beads were used in the days of the flapper to embellish garments before sequins were developed. This bead is a single holed sew on Antique Nailhead. Really sweet beads.