
So the plan is to save as much of the original horn work as possible. The screw in finial just needs a little dressing up. The 4 tacks need dressed up and cut back. The base plug is a bit stunted and the hole for the finial is way off center and the inside threads are almost completely gone. But it fits nice and secure so it's a good start.
The plan, tentatively, is to drill out the finial hole and plug it with a dowel. Shave off the top of the base plug and install a donor piece of wood. Turn it to shape, hollow out the bottom of the base plug, re drill and tap the finial, and install the base plug. Then likely turn into a bone tipped and banded horn. He had some sons who live down south and that may be the direction he was going with it.
I'll need to research and find out where acorn finials were prevalent before proceeding. It may have just been something he picked up at an Ace Hardware sometime back. That will complicate matters if that's the case.