Strange matchlock pistol for ID CHINA ?

[Cerjak]

Hi Rick ,
Thank you very much for your interest.
Actually when one pushes the trigger, the pan cover moves backward and the serpentine get closer to the pan. When one releases the trigger the pan cover moves back to its normal position, and so does the serpentine.
Therefore its an automatic pan cover mechanism.
Did you notice Anthony C. Tirri", pag 460 fig 322 about imitation damascus stell ?
If a day you find more information about similar system please let me know.
Best
Cerjak