Wow, those gunflints are cool.... how can you really be sure... they flat on the top... worked on the edges?..they look all somewhat square....what were they used for?.. still learning!
You can goggle up black powder rife gun flints, those are European. I posted one of the two that I've found that are Indian made. Had mulitple identifications on them including from Dr. Hester last year over in Hondo.