Much Weathered Sculptural Antique Iron Finial (Lightening Rod Tip?)

Another wonderfully sculptural very old iron finial from a group of them found this week, this one I especially love for looking like an arrow shot through a sphere. The base has eroded such that it will no longer stand on its own, but I think this one is better laid on its side, anyway. 10 inches long, with a few holes rusted through in the sphere as well as base, all to the good I think.