Vintage Charles David real pony hair slides

These are so unique. Ive never seen anything like them. This is vintage Charles David. They are made with hair across the bridge of the shoe My research says that its pony hair but could be other hair. It's very soft yet bristly like hair. They are in great shape. They look like they have never been worn more. The base of the shoe is solid wood with the great variation in grain that wood gives.