Quote Originally Posted by iwire View Post
I decided to check my tool box near me to see if I had a punch inside to show here. Even better I found a 2" die that still has my painters tape and sharpie mark pointing out the marks I was talking about.

They are small and faint but I have found them on most if not all punches.
Another method I have found that seems to work better as my eyesight declines is to use a white paint marker to highlight the marks on the KO die.