Tim,
Plug is two pieces of end-grain walnut. There are no "ghost" holes for old tacks on the back side/carry side of the bands. The plug's tacks run completely around the perimeter, but the bands were only tack-decorated on the front sides, leaving back of bands bare and prone to heavy wear. Too bad the bands weren't tacked all the way around; tacks might have preserved the back side of the bands better.
Despite my being a huge Tansel and Mercer County [OH] fan, this is one of my very favorite horns due to the fine lathe work on both the plug and the spout. For being an uncarved horn, it's a fascinating and very well-done piece of work.
By the way, if you look closely on the left end of the dark, front view, there is a small "W" carved on the horn. I think this is George Washington's personal horn; just wish his cherry tree axe came with it!
Shelby Gallien