Just excellent images, Alexander!
This one sure is a roaring New Year's fire cracker.
Actually these seem to be two different guns, and I'm not sure which one the scrolled and marked rear finial belongs to.
The one with the hook to me seems to have been made about ca. 1430-40 and it is very nice to see that it retains most of its original painted red lead (minimum) painted surface.
Could you please mail me the images in high resolution?
Anxiously waiting to see more of the museum's extended exhibition,