We have a Brass lamp finial vintage item.  It measures about 1 1/4" in H x about 7/8" across the center round.  The threaded portion is about 1/4" across the center.  I do have a small batch of these available.  There is a small amount of excess brass in the center from manufacture - I photographed the worst one I could find.  Otherwise they are very slightly tarnished and show gentle wear.