Old brass marker that way used to mark street crosswalks. The company that made this sold advertising on the top of their markers then put them out in the streets of America....great idea! As you can see, this one advertises Planters Nuts. Has words \"After School\" on it, so it may have been in an area where kids walked to and from school everyday. Measurements are about 4\" across the top and the hook is 2\" long. . $7.85 priority mail shipping.