Vintage ladies opera length Czech Black Glass & Faux Pearl lariat style necklace is gorgeous. Measurement 34" L. or 68" end to end. the black glass beads or sleek rectangular shaped beads (13mm). The glass faux pearls are uniform in shape (5mm). Necklace is beautifully made. Hallmarked .925 on clasp as well as a makers mark. M with a line above it with a small 0. Circa 1950-60's. I have not been able to identify this hallmark.