Here is a pair of Tiffany & Co. sterling earrings. The knot is made up of intertwined narrow rope chains. They measure 3/8" in diameter and the weight is 2.29 grams. They are stamped on the posts T & Co. 925. Sorry but I do not have the original backs. Excellent condition.
Tiffany & Co. Sterling Rope Knot Pierced Earrings