You may find the information in the following recent link interesting.
https://www.1911forum.com/threads/5t...#post-13845559
Not saying the long held mystery is solved. But Magnaflux testing and subsequent inspection stamp does sound feasible.
You may find the information in the following recent link interesting.
https://www.1911forum.com/threads/5t...#post-13845559
Not saying the long held mystery is solved. But Magnaflux testing and subsequent inspection stamp does sound feasible.