Hi Fernando K and Michl,
Thank you both for your kind post and compliment.
You are both right to say that to make this time line more accurate, it would need also locks from other countries.
As Michl pointed out, the early flintlocks where designed in France, Paris. During my research i found that there are many instances of flintlocks in other countries which would be dated older when looking at my study. Germany and the Netherlands seem to be adopting the styles the quickest, though with minor differences like the lack of the 'toe' (see the schloss Dyck lock).
Hopefully in the near future i might be able to make a follop up in this thread (help is always appreciated
)