I'm a first time poster. I had a Kiser Rifle 10 or so years ago with the same signature and patchbox finial with the same deeply scooped engraving on the petals. I also have another kiser in the shop with the same daisy finial treatment. His guns seem to be rather scarce as yours is only the third one I have seen. He possibly had his training with someone in the Lancaster, area.
Nice gun.