In the previous thread, Doc Drew showed a blow up picture, on May 6, with braze showing a clean bronze color. That braze was not likely to have been exposed to oxidizing conditions until the moment of the blow up.

Is the thought now that the factory sent this gun out the door with what appears to be a large pit in the chamber area and what appears to be a braze joint that was never complete? Nothing changed or affected the chamber area of this gun in the last hundred years?