I know quite a few of you are firearm owners and have more than a little interest in them. With that in mind, I think this might interest you:
As a member of a muzzleloading firearm forum, flintlocks aren't anything special to me. I own more than 8 of them.
The lock that preceded the flintlock was the wheel-lock, a lock seldom seen in these modern times. When it is seen, it is usually a part of a gun that was built over 300 years ago.
Wheel-locks were very complex and owned by the very rich.
Rather than using a piece of flint striking the frizzen to make the sparks that light the priming powder, the wheel-lock has a spring driven wheel that spins against a piece of iron pyrite to produce the sparks. The sparks light a small amount of black powder which in turn lights the main powder charge thru a small hole in the side of the barrel.
A gentleman in Poland currently builds traditional wheel-locks. All of the parts are hand made. The attached video shows two of the locks he made, in action.
https://www.youtube.com/watch?v=SqIFo75qEyg