Specially for Michael
Pictury from the manuscript of last third of 15 centuries "Feuerwerks- und Büchsenmeisterbuch" (Probably, there is an error in dating but clothing and armour talk us that it is a really 15 century) It is amazing but we can see the earliest pictury of snapping matchlock. Probably, mechanism of this type
You can download this book here:
http://daten.digitale-sammlungen.de/...036875/images/