Interesting find.
What part of the country did you find this? Under what context was the find? By this I mean was this found in a field detecting an old house site, or was this in a settled area like a town park, or in the town itself?
Do you recall the depth of the find? Was it on top or close to the ground top?
The hole and clasp, was the clasp added by you or was this found on the item?
The hole, does this appear to be drilled or melted through? If drilled that give a potential different age range as a hole made by pushing a red hot metal rod through a softer material. Under magnification what does the inside of the hole look like - if anything can be discerned.
For an example of the hot rod pushed through a softer material, consider old Indian medals were this was done to allow suspension.
Is the material stainless steel or possibly silver? Stainless has only been around for approximately 100 years, while silver many centuries.
Under magnification do you see other metal in the engraving area? A microscope may be needed for that sort of inspection.
Copper used to manufacture modern native American relics sometimes exhibit copper marks only visible under magnification.
