I've never seen a rope made of leather lace. These may be made for the tourist trade, but would not an original cowboy item. Original riata's were made of rawhide, not leather. Some were four platt, some were six. Most often, they were cut in 1/4" wide strands. The rawhide was soaked in water until soft, then the strands were cut from the whole hide, starting in the middle and cutting in a large circle, all the way around the hide up to the outside edges. They were then braided wet and left to dry. I have several in my collection, most are in the 40 to 60' range, but I do have one four platt that measures out at 92' in one piece, no splices.