Below is a crop of one of my photos from the Exhibition showing the first two steps in the case making process. Look closely at the first step. Now, remembering 30 years ago when I worked in my late father's sheet metal and machine shop, the burrs on the bottom of the first piece suggest to me that the blank was stamped from a larger piece of material.
Perhaps our resident metal expert and machine shop owner, Bill Bull, can contribue his opinion.
