Antique Early 19th Century Brass Curtain Tie Back Knob LARGE. Awesome very large sized and very old brass curtain tie. Part of a collection I’m selling. The brass examples are roughly 4 1/4 inches in diameter and 4 1/2 inches to base of screw or where it would flush with a wall. Early cut screws and I would date these to first half of 19th century. Very good antique condition.