Pictured are two of three of these gizmos. Profile and bottom view. They are copper with a nickel finish. Almost 7/8th" wide and high. Non-threaded hole in the ball and a threaded hole in the base. Kind of like a guide that screws on. These were found at a mid 1800's site. What do you think?
IF the hole on flat end is threaded... it may be a "towel bar" type dealio... which these were also used as a "finial" type bar system on top of things.