17th German iron flintlock pistol

[Raf]

Originally Posted by Lansquenet59

Hi all,

I have just acquired a rare German flintlock pistol from the 17th century, manufactured between 1643 and 1700 by the Coeter family. It is completely made of iron with the external mechanism. Its length is 43 cm.

This is a wonderful thing of breathtaking elegant simplicity.
Do you know the function of the two screws , one visible in front of the cock , the other in front of the flashpan that appear to enter the elongated breech section ?