I found this old add dated 1922, I believe I had seen on the wonderful web site shotguncollector.com also probably lifted from there so must give credit to our European Friend( absolutely wonderful work Sir).
![[Linked Image from i.imgur.com]](https://i.imgur.com/akOGHzk.jpg)
Translates We machined to ensure that the stamps on the finished Lauren must have this exact wording; every deviation versatile the counterfeit
Seems to say that the German made Krupp steels were only called this if authentic German Krupp as of 1922.
I assume that means all other names except these were not licensed or from other licensed companies in Belgium?
Do we actually have the tensile strength of these specific 3 steels? Seems like the 3 ring special gewehr lauf steel numbers are all over the place?
I know this has been written about many many times but I thought someone could nail down these three with this wonderful 1922 add?
Thanks