Gentlemen,
Thank you for the confirmation, kind words, and encouragement. I thought to myself if they could fake the corrosion/patina around the seppa dai on this tsuba, there was no way I could ever tell a copy from an original.
"I think Shingen tsuba fall into a category of "samurai" weaponry. Maybe they should be viewed as "militaria" rather than "art"."
Peter, your statement makes perfect sense on how these are perceived.
Geraint, thanks for the link.
One final question. Are these considered late Edo?
Thanks again for all of the assistance.
Zach