Post 1939, forward a bit of where we have been, all centralfire shoulder weapons were to wear a DIN(Deutsches Institut für Normung) designation, which was a steel type stamp indicating hardness. This is why the makers applied a Steel Type stamp, which was more than just advertising. I wouldn't mind seeing their charts for the steel characteristics associated with each steel type stamp.

Replacement parts that required special tools to attach were to be stamped w/ an >>E<< noting Ersatz or replacement.

Too, arms voluntarily summitted for reproof that typically didn't fall in the obligatory category, after reproof were stamped Eagle over >>FB<< or Freiwilliger Beschuss.


Hochachtungsvoll,

Raimey
rse