Well, where definitely matters for dating by artifact type... but faceted blues of that type are "Late."
Gunflints... French flints, also where matters. Canada and upper Midwest, not after 1760, BUT they start showing up again at military sites in the U.S. by 1832, meaning the government was buying from France. Mississippi Valley is a whole other story, the French were in there later. SE you probably won't see French flints.
Since you mention, here are my flints. 11 French heeled flints, one English heeled flint, and a French and a English prismatic flint.