Don't have the book, but my wife's great aunt is Thurlow, Lois J. (Jean). She is on the list of employees on the link that G26ster posted. She made firing pins. More specifically made the cut on the left side of the tail. Most of wife's family has worked for SSG, Delphi, or now I think it is called Saginaw Steering Solutions. Her father still works at the new plant off of 75. They leveled the old gun plant several years ago. I have not got to talk to Jean about it other than at a family reunion real briefly. But what she discribed was spot on to what a firing pin is. She said she just knew she was making one cut and passing it down the line. I would like to get a copy of this myself because of the family connection.
Dave