In the first video you can see this skiving being done and, later in the background, the copper rivets being rounded off.
The other side of production is the old iron machinery that still produces Brooks springs and steel blanks, later punching out the various parts of the skeleton of the saddle onto those blanks. The video shows one of the two 1940s monsters that produces the springs. One does the right springs, the other the left. They are seven-feet high, ten-feet long and – as you can hear – very noisy. One is German, one English, but they have worked together in harmony for over 60 years.