Interesting website
http://www.afte.org/ExamResources/gallery2/v/Headstamp-Gallery/
I recognize most brass headstamps, but there are a few that I don't, this will come in handy.
Complete thread:
http://www.afte.org/ExamResources/gallery2/v/Headstamp-Gallery/
I recognize most brass headstamps, but there are a few that I don't, this will come in handy.
Complete thread: