Antique British Vintage Self Adjusting Shoe Tree

THIS UNIQUE AND INTERESTING SHOE TREE COMES FROM ENGLAND and has a label near the wooden handle that says, Self Adjusting Shoe Tree Patent #2777. It is 10" in length and made from a formed material that I am not certain of. Originally there was a button or tab of some sort at the toe, but that is missing. It was to cover the place where the thin wood frame joins the handle and toe on the underside. There is a leather piece covering that frame and it is loose and part of it is missing.